And as for Windows, give the Win7 Release Candidate a try- free download, and it is everything Vista was supposed to deliver, and then some. Many of Apple's devs are actually running Win7 on separate machines now so they can keep tabs & make sure they're reaching far enough to keep their edge. They've never done that before, so that should tell you something.
And the DH is a wonderfully simple, compact & useful device. If I got an AP, I'd probably keep my DH, too.
Oh, just be sure you get the 32-bit Win7. DH software does not function in a 64-bit OS.