jeff,
I'll admit Aark is way behind the curve. Win2k has been out how long? One thing you won't hear is the common complaint about releasing something too soon, and "public beta testing" on "production" software.
Anyhow, they're up to Beta 4 now (MME/ASIO, still no WDM), and I've heard some success stories of users getting it working with Win2k and XP. I haven't made the leap yet, but I just ordered a new barebones box, and I'm gonna give Win2k a whirl...
Queue