I know that Vista was supposed to have all these wonderful new features like WinFS (a new way to search your hard drive IIRC). I wonder if the missing Longhorn features like WinFS made it to Windows 7.

Um, given that a beta and now Release Candidate are available, I'd say that would be a pretty easy thing to find out.

For the record, WinFS is not in Windows 7. In fact, plans to release WinFS were, as far as I know, shelved indefinitely. It might be resurrected in the future, but who knows?