Lots of stuff - not convinced by launch titles, doubts about the controller, think machine is overpriced for what's inside it, just don't have the excitement I felt about the Cube. I'm going to give it six months or so and see how the software line up is starting to look - when both Super Mario Galaxy and Metriod Prime 3 are released and reviewed and it's clear how developers and publishers are treating the system and how the remote is being used, then I'll reconsider.
Right now I think it's probably fairer to let someone who wants one badly to get it really - there's no point in me depriving someone else of one when I'm not that excited.