There's a device called IRIG that plugs into an Ipad or Iphone's headphone jack. It has audio out and audio in (1/8" and 1/4" respectively). Once you get that and plug it in, you download Garageband (yes, for the Ipad/Iphone) for $4.99, and you're in. I have a home recording studio on my PC and I've always been a PC guy, but my boy gave me his Ipad because he upgraded to the Ipad 2. He came over and showed me this shit. He even had an extra Irig adapter for me. So, yeah, this is amazing. Oh, it even has a drum machine, as well as stomp boxes and effects galore with ZERO latency. I can actually plug my guitar in directly, add a Mesa Boogie Triple Rectifier, and go to town without even .00001 of a second of latency. It works so good that I could use my Ipad live as my effects processor. You've all tried, I'm sure, to use amp modelers and effects in your DAW. As an effect, they work great, but to use them in real-time - I just want to bash my head against a wall. The latency makes it unplayable for me (that little delay). But not with this shit. I've got a lot of playing around to do tonight. Anyone else get down with this shit?!