Has anyone had any experience with a guitar cord adapter, for iPad or iPhone? I'd like to connect my guitar to GarageBand, but I'm not sure which one I should get. I talked to a guy at the Apple Store, who showed me the iRig they offer, but said it might be a good idea to shop around first, since he didn't know much about it. I've also heard people talk about using the iPad and an amplifier, using the iPad as a sort of universal effects pedal. I don't really know how this would work, though, since once you've got the iPad hooked in it seems like it's a dead end.