[Updated 5th July]
In this post, I will try to maintain a regularly updated list of all the changes that happened during the off-season, so that we all have a reference point.
Rachael Flatt - Tom Zakrajsek > ???
Elene Gedevaneshvili - Robin Wagner > Nikolai Morozov
Alexe Gilles - Tom Zakrajsek > Yuka Sato & Jason Dungjen
Elena Glebova - Anna Levandi > ???
Alena Leonova - Alla Piatova > Nikolai Morozov
Valentina Marchei - Nikolai Morozov > Yuka Sato & Jason Dungjen
Jenna McCorkell - Juri Bureiko > Gurgen Vardanjan or Simon & Debbie Briggs?
Ashley Wagner - Priscilla Hill > John Nicks
Agnes Zawadzki - Tom Zakrajsek > David Santee & Christy Krall
Joshua Farris - Tom Zakrajsek > Christy Krall & Damon Allen
Javier Fernandez - Nikolai Morozov > Brian Orser
Adam Rippon - Brian Orser > Ghislain Briand > Jason Dungjen
Kevin Van Der Perren - Juri Bureiko > Gurgen Vardanjan or Simon & Debbie Briggs?
Elena Ilynikh/Nikita Katsalapov - Alexander Zhulin & Oleg Volkov > Nikolai Morozov
Nathalie Pechalat/Fabian Bourzat - Alexander Zhulin & Oleg Volkov > Anjelika Krylova & Pasquale Camerlengo
Partner Changes - Pairs
Jessica Dube / Bryce Davison - split
Tara Hancherow / Sebastien Wolfe - split
Jessica Dube / Sebastian Wolfe - new team
Bryce Davison has a very serious injury and might not be able to return to skating.
Caydee Denney / Jeremy Barrett - split
Caitlin Yankowskas / John Coughlin - split
Caydee Denney / John Coughlin - new team
Jeremy Barrett had over 30 stitches after Denney cut his calf during a program run-through. He has now retired and is going to coach and perform in shows.
Caitlin Yankowskas has returned home and has made no announcements about her future, yet.
Sally Hoolin / Jakub Safranek - split
Catherine Clements / James Hunt - split
Sally Hoolin / James Hunt - new team
Jakub Safranek is skating in shows, whilst Catherine Clements is going to focus on singles.
Kaela Pflumm / Matteo Guarise - new team (gonna compete for ITA)
She used to compete for the US with Christopher Pottenger. He's a former Roller Skating World Champion.
Felicia Zhang / Taylor Toth - split
Erika Smith / Nate Bartholomay - split
Felicia Zhang / Nate Bartholomay - new team (Senior)
Taylor Toth and Erika Smith are both looking for new partners.
Britney Simpson / Nathan Miller - split
Britney Simpson / Matthew Blackmer - new team (Junior-eligible)
Nathan Miller has retired from competitive skating.
Mandy Garza / Brandon Frazier - split
Haven Denney / Daniel Raad - split
Haven Denney / Brandon Frazier - new team (re-teamed)
Becky Bereswill / Trevor Young - split
Becky is returning to single skating and will train under Yuka Sato & Jason Dungjen. Trevor Young has retired.
Kaleigh Hole / Adam Johnson - split
Adam has retired and Kaleigh is going to focus on single skating.
Darja Popova/Bruno Massot - new team (training under Steuer)
Adeline Canac/Yannick Bonheur - split
Yannick is looking for a new partner (for competition or shows).
Lots of Canadian Junior Pairs parting ways:
Catherine Balde / Maxime Deschamps - split
Katherine Bobak / Matthew Penasse - split
Gabriella Debono / Christopher Sisca - split
Jade-Savannah Godin / Andrew Evans - split
Natalie Kwong / Garnet Suidy - split
Aveline Pearson / Alexander Sheldrick - split
Kristen Tikel / Ian Beharry - split
Katherine Bobak / Ian Beharry - new team
Zoey Brown / Maxime Deschamps - new team
Becky Cosford / Garnet Suidy - new team
Julianna Seguin / Andrew Evans - new team
Natalie Kwong has quit. Matthew Penasse and Christopher Sisca are looking.
Partner Changes - Ice Dance
Vanessa Crone / Paul Poirer - split
They are both looking for new partners.
Madison Chock / Greg Zuerlein - split
Emily Samuelson / Evan Bates - split
Madison Chock / Evan Bates - new team
Greg retired and is focusing on coaching and university. Emily hasn't made any announcements yet.
Madison Hubbell / Keiffer Hubbell - split
Alissandra Aronow / Zachary Donohue - split
Madison Hubbell / Zachary Donohue - new team
Alissandra Aronow is looking for a new partner. Keiffer Hubbell "is exploring his options, both on and off the ice."
Sarah Coward / Michael Coward - split
Sarah Coward / Avidan Brown - new team
Rachel Tibbetts / Collin Brubaker - split
Collin is looking for a new dance partner, Rachel's plans unsure (she's not listed on IPS like he is).
Lucie Mysliveckova / Matej Novak - split
Matej has quit skating. Lucie had a tryout with Pierre-Loup Bouquet and they might be skating together (although Czech Federation is trying to persuade Matej to return).
Federica Testa / Christopher Mior - split
Federica Bernardi / Christopher Mior - new team
Federica Testa / Sasha Palomaki - new team (he's Finnish and used to skate with Oksana Klimova before, they will represent FIN)
Brooke Elisabeth Frieling / Lionel Rumi - split
He is looking for a new partner.
Kristina Gorshkova / Vitali Butikov - rumoured to be split
He retired, no idea if she's going to continue (only a rumour for now).
Molly Aaron/Daniyel Cohen
Mylene Brodeur/John Mattatall
Lisa Moore/Justin Gaumond (Lisa might return to skating in the future)
Sinead Kerr / John Kerr
Bryce Davison (still hasn't fully recovered from a very serious injury, might not be able to return to skating)
Peter Liebers (broke a bone, question mark over the next season)
Russian Federation banned their coaches, making use of state resources, from coaching foreign skaters
An exception has been made for Morozov, as he is very much wanted by the federation.
He's going to continue coaching Ando and will be allowed to work with other skaters as a consultant.
Cappellini/LaNotte will spend half of the month with him and half in Italy. Amodio is going to split his time between France (Annick Dumont) and Moscow, after spending a month in US with Zakrajsek.
Team Event added to Olympics
A positive development coming from that: JSF is starting a Pairs/Dance program.
Faiella/Scali returning... or are they?
Changes to Grand Prix format
Top 6 at Worlds allowed to do 3 events. Number of spots reduced to 10 for Singles and 8 for Ice Dance. A minimum score (2/3 of top previous season score) is introduced (although Peter Krick has now talked about scrapping that).
Krasnopolski imprisoned for desertion
A court sent him to prison for 15 days (don't worry, as Tahbka said army prisons are more like summer camps) for desertion.
Israeli Fed claimed they agreed with the Army about postponing his service till after Worlds. The Army claimed they didn't agree to such thing.
Cyprus, Grenada and Morocco made provisional ISU members
Third tier NA skaters celebrate.
Thanks to everybody who has shared info in this and other threads. I've just compiled it.