Hello everyone: I’m using the iLiad with my PowerBook and so far it’s been all right. The unmount/remount issue is quite annoying at first, but once you get used to it’s no big deal (well, not as big as the iLiad OS constantly freezing on me anyway).
By the way, you might be interested in
this thread over at the iRex forums, we’re discussing Automator workflows for saving PDF straight to the iLiad from any OS X app.