Stargate: Infinity (a cartoon spin-off series that ran for 26 episodes and I've never seen) will be released on dvd next year.
If you start going through Heroes withdrawals, there are the online comics and a game at the NBC website.
Someone is listing scifi short films from the beginning of film (1894) to the fairly recent. Most of them are linked for online viewing.
CNet has a slideshow tour of Skywalker Ranch, focusing on their sound division.
DVRs for tonight:
8pm My Name is Earl
9pm CSI & Grey's Anatomy
10pm Without a Trace (3rd ep with James Marsters guest starring - we missed 601 & 602)