Garageband for iPad was announced along with the iPad 2 yesterday. It could be considered the first mainstream DAW to go tablet. I like that Apple is pushing the creation/full computer side of the iPad with it’s own apps. Garageband for iPad is in decent company along with iPad versions of iMovie, Pages, etc… You have to wonder if Ableton has a team working on iOS software.
“GarageBand for iPad gives you all the tools you need to lay down fresh tracks and record music anywhere you go.” – apple
For more info: apple.com/ipad/garageband