The first four Word-format Exchange 2007 guides are now available from Microsoft Downloads. Don't bother looking at the Exchange 2007 site for them yet; they're not linked there (but I'm sure the website will be updated within the next few days). These guides are aimed at helping you deploy Exchange 2007 into organizations of varying size:
I've not had a chance to look these over yet -- I'm busy with another project -- but I really like the fact that they're starting to give focused guidance depending on the size/type of organization you're intending to deploy. There's a lot of FUD floating around out there that Exchange 2007 is no longer aimed at the SMB market, a lot of it predicated on the licensing changes, renewed emphasis on Hosted Exchange services, and the continuing angst over the 64-bit hardware issue. This kind of guidance, easily packaged for printing out, might help combat that FUD.