I own the Belkin VideoBus I, which as far as I can tell is identical to version II, but lacks audio support. It came with an OEM verison of Strata VideoShop, which I've never heard of before or since (so probably no OS X version). I had to use a separate audio cable to capture sound to my Pismo's Sound In port. The capture format was .Mov, which is swell, but it means there's basically no hardware accelerated compression, so the quality was perceptibly worse than MEPG-1. After a year of light use I bought the Dazzle for $225 at buy.com
For what it's worth, I believe you could find a shareware for OS X that will work with it. I have BTV and it's a good app with good support, though I never tried it with USB. I also saw MediaCapture, and the driver for the EscapeTV product (or whatever it's called) might work, since I think it's the same hardware as the Belkin one.