I've been hearing rumblings of the sync framework for quite some time now and it has finally been released to CTP! I've got to say, if this thing "really" works, then it has the potential to change the way that we consume data. Once I get my home development machine re-imaged (hopefully tonight), I'm going to try to get this thing to work with SharePoint 2007. How cool would that be!
You can read about and download the sync framework here.