Cabin fever's a bitch, huh? Everybody always says "take up a hobby!" but I've got like four and I really don't give a care to do anything with any of them. Tried music? If you've got a speedy (or so) internet connection, you could fuddle around with pandora.com, which is moderately fun, and can show you a lot of music you'll like that you've never heard of before.
There're some fun internet cartoons out there. I can swallow up an evening reading the archives of a webcomic, or watching Homestarrunner.com, or meandering around wikipedia (or any of the various other wikis, like uncyclopedia or encyclopaediadramatica, which are usually hilarious). The internet's a vast and humorous place, if you do a little digging.
Here's to hoping you feel better, Lee.
~Grumps McGurt