@ Ed,
Sadly, I think Haage and Partner are still selling it though they shouldn't, but there are still drivers in development for Amithlon. In fact, I just installed PCIInfo 2.0 and the updated library last night.
As it stands, it's great for what it is, but that's all it really ever will be. If you can find it, I highly recommend getting it, as it's wonderful software, but AROS is really the way to go using PC hardware. AROS is coming around nicely and once it becomes more stable, more robust, I'll swap my Amithlon box for an AROS one.
Or, until I get my A1 or PegII. ^_~