Couchville.com is a sort of TV guide on the web; simply a great idea. I almost always have a laptop sitting in the living room, and the little 3-line channel line-up that comcast scrolls through (with the HUGE advertisements going on above it) is too painful to use; this is perfect.
Mind you, I watch comparatively little television to begin with, but every once in awhile you just want to know what’s on, to see if there’s anything worth wasting a half-hour on.
I use http://freeguide-tv.sourceforge.net/ - obviously a download rather than online, but it is reasonably configurable and usable.
Very handy! … My mother would probably use this more than anyone I know. I’ll pass it on.