We've just been through "pilot season", when the pilots are all filmed. Now we move into the Upfronts, where the networks announce their fall schedules. So now is the time when we normally start hearing about new shows for next season, as well as about cancellations and renewals.
So far we know that House has been renewed, but this could be its last year. Not due to ratings, but due to $$$. We'll have to see.
Fox has also renewed Family Guy, the Cleveland Show, the Simpsons, and American Dad. They have cancelled Breaking In, Traffic Light, Lie to Me, Human Target and Chicago Code.
The actual Upfronts presentations begin Monday, May 16th - NBC will start. The other networks follow that week.