http://money.cnn.com/2011/03/17/tech...times_paywall/Starting March 28, non-subscribers will be able to read only 20 online articles for free each month.
Home delivery subscribers can continue to access online and app content for free. Non-subscribers can choose from three packages: $15 per month for Web access and smartphone content; $20 for Web plus access to the Times iPad app; and $35 for Web, tablet and smartphone access.
I remember the Times tried subscription for a portion of its content a few years ago (Times Select?). They abandoned it after what seemed like less than a year.