They're currently working on it!
Of course they are - would just be nice to hear some more of it....perhaps from Ron :-) (Official I mean)
I'm sure they'll have alot of things to say once the official Windows 7 is on the doorstep. All things being equal, look at our track record so far, we've been prepared for Vista, Server 2008 etc. I think it will be safe to base your planning on that Win7 will be fully supported.
Btw, aren't you on the EAP? (IR2, should be out this month, afaik should support Win7)