http://www.beerconnoisseur.com/the-origins-of-ipa
I'm not a big fan. I can think of a handful that I like, and I only like them occasipnally.
That said, some ya'll love the hell out of an IPA. So tell people like me why.
This is a good one.
American
http://beeradvocate.com/beer/style/116
English
http://beeradvocate.com/beer/style/150