Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.
A great new deal of books are reaching the market, which waits hungry for office & sharepoint 2007 knowledge!
Inside MOSS 2007 (Patrick's), which I'm waiting eagerly for
Designing Forms for Microsoft Office InfoPath 2007 and Forms Services 2007 (Scott Roberts & Hagen Green), which I reviewed and find a good source for all that is InforPath and Forms Services 2007 (holds your hand from novice to intermediate).
Workflow in Office 2007 (David Mann), which I'm reading now and so far, so great