One day I'll get round to this one, but until then here is a post on the subject from Tim Keller, here is a response to it from the fundaMentalist Pyromaniacs, and here is a totally different approach to the subject. Personally I think most peole when they read or talk about Hell are working with a concept that has been defined more by medieval superstition (and popular culture) than biblical research, so you might be able to guess which of the above approaches I tend to lean towards (but maybe not, I like to keep you in suspense). But more to come later . . .
[Edit. Sorry, I wrongly assumed that the Pyro's were discussing the Tim Keller article on Hell I had read, but they weren't it was this one. Same guy but different article. Thanks Glenn!]