[Knight of Gondor]

Um, I don't think Gollum could have aged physically any more than he already had. He had lived with it for hundreds of years, and his life was tied in to it so much. It depended on it.

Bilbo carried the Ring much less, and I believe his innocence of spirit or something kept him from severe negative affects. In the books, Bilbo aged, yes, but probably not physically like he did in the movies. (That was sad! What'd they do that for? He was capable of riding a horse in the book)