I'll join you in derailing the topic!
I got a irig stomp to play with. Effect wise amplitude is nothing special, its not exactly sudio quality although much better then the original irig, but it does have a nice 8 track recorder/looper that will record for what seems to be forvever. I'm assuming it'll record until I run out of space. I have my home Mustang III conncted to it so I can use the effects on the Mustang or Amplitude and record/loop. Or just a quick headphone setup for on the couch. For $50, its already paid for itself. Keep in mind though that amplitude is another few $$$ too.
I'm still learning garageband. I love the idea of a small setup for just messing around.