@Motrucker - try ordering one, the price actually went down after I added it to my cart and started filling out my order info. Win! Very slick website they've got, BTW.
There's another thread here on amiga.org where a bunch of users posted their speed test results with this card and Roadshow. Of course most of them are on ZIII-equipped systems, will have to see what I get on ZII, but yes, the card is supposed to be able to switch speeds depending on the bus. Not looking forward to trying to figure out Roadshow, might try it with Genesis or Miami first.
Another thing I'm not too keen on is the USB ports on the card aren't active yet (waiting on an update), but since I want this mainly for the Ethernet that's not too big a concern.
Will let y'all know how it works out, am sure I'll post some middle-of-the-night rant if I can't figure it out, LOL. 
Mike, go with Roadshow. Easier to setup than Miami or EasyNet. I tried all 3 and roadshow is super easy and performs the fastest....