GonzoGamer said:
Or is there a guy/zombie/demigod type thing living in that tower the eye is on top of at the time the ring was destroyed? I'm not quite clear on that and guys I know who have read everything (and I mean everything) don't seem 100% on it either. The way some describe it, he's like the badguy in Inspector Gadget; just a claw & and eye. I know he had a bunch of forms thruout the history of Middle-earth but at the end, when the ring is destroyed, what form(s) did he have?
Kinda sorta. Sauron is one of the Maiar (see also, the Istari, such as Gandalf and Saruman, and Balrogs), which are basically the Middle-Earth version of angels.
What that means is that his physical form is kinda irrelevant. It's a manifestation of his will and an exertion of power, nothing more.
Now, specifically in answer to your question, there are no physical remains of Sauron's body from when Isildur cut the ring from his finger. This includes the eye they used in the movie. That eye isn't really an eye so much as a symbolic representation of Sauron himself. It's his spirit atop Barad'dur.
Theoretically, he could make himself a new body, but it's heavily implied that he requires the Ring in order to do so. That's one of the reasons why him getting it would be so bad.