Hey man, I was thinking about picking one up myself a few weeks ago after a visit to the Mac store here in town. I did some research on some forums and whatnot and have heard nothing but good things. Basically it's like a mini G4 or G5, basically. With the new dual-core Intel brains, it should be lightning fast, which Macs already are...upgrading the RAM with another 512 chip (putting you at 1024mb/1gb, plenty of horsepower for your plugs) or even a 1gb chip and spending a couple $100 on an external drive + case, I think you'd have a pretty mean little Mac machine sitting there for your recording purposes. I already have a dual 2.3 G5 and a PowerBook G4, so I don't think my fiance would like me spending more money on yet another Mac, heh. If I needed another little G5 running around, I'd definitely nab one of those mini's. Fo sho.
~006