Sever, if you want to get rid of vampirism, download the "cure vampirism" mod i posted in your "where can i get mods" thread. I just did, and i'm cured now, it was just too much hassle not being able to travel in sunlight without damaging my health all the time.
When you installed the mod, a mysterious chest will appear in the Cheydenhall Dark Brotherhood hideout. Once you located the chest, you'll find out that you need a key to open it. Now this is where the mod's creator shows he's quite the sadistic little bastard, because i've just spent half an hour trying to find the damn thing, but in the end it's well worth it. There's two "cure vampirism" potions in the chest, although you only need one, and apparently noone has ever experienced becoming a vamp for the second time in one game, but you never know, so you best hang on to it.
Now there's still one nasty little side effect from having been a vamp...the churces won't restore my damaged stats, since i currently have an infamy rating of 100, and my fame is only 8. The message i get inside the churches when clicking on the altar is as good as "get lost you freak", so now i better find someone who can sell me a restore personality potion.