Bluntly put, no.
Android is still very much an immature platform and, while exchange support is there, it's more of an afterthought than a feature (it's not even mentioned in release documentation).
Winmo has it's flaws, and we all know it, but we also know that (at least for us in the connected corporate world) either a blackberry but most ideally a winmo phone is the best, most reliable way to take your office with you.
Android is more of a consumer OS (it was aiming at Winmo's throat first, but since winmo pretty much undid itself, now it's going for mobile-osx), and I can tell you from using the dream that (and this is just recently with the 2.0 eclair build) that exchange support is there, but kind of shaky. Also, the options for viewing/editing office documents are very limited. There are apps that will do it, and there are better mail clients, but just the thought that Winmo includes it all out-of-the box. I think you're well suited with your HD2 (or maybe a less consumer-oriented device, I'd go for the omina or touch pro2)
Best reference thread ever: Learn to compile your own AOSP build
(for sapphire, but applies to dream too)