I found an additional tool that I would like to include in the WhatIWantMost project: EViL, Dave Donaldson's Entity Validation Library. I saw Dave give a presentation on using custom attributes for entity validation at CINNUG a few months ago and I thought it was a very slick idea and neat implementation. Friday Dave posted that he had added the library to CodePlex - I knew it was a sign.
A friend pointed me to a pretty cool Wishlist site that he used before put together by Jeremy Beker using PHP. I know I said I wasn't going to look at any other sites in the same arena, but it's pretty cool and he did a good job. Nice site. You can see for yourself at: http://wishlist.confusticate.com. WhatIWantMost will not include all the features his site does, at least not to start with, but if it ends up being that good functionally then I will be pleased.