I've read recently that NBC may not allow for a third season of Chuck... (which would be quite depressing...) It isn't officially rid of, but in order to prevent it from being taken off the air, support is needed.
If anyone here is a fan, I would highly suggest writing a letter in order to "Save Chuck". Here is a website with a couple addresses to send letters to:
http://chucktv.net/about-2/chuck-campaign-watchbuyshare/I suppose you all know what I'll be doing with the next hour or so...
*opens up Microsoft Word and begins to type*
(edit: April 26, 2009) I just pelted NBC with Nerds candy, he he he. Just kidding, though I did send a box of Nerds candy in each of the letters I sent.