|OneNote for iPad|
Well the iPad-native app is out now and it's pretty much just that. Same features, just adjusted to fit the resolution of the device.
If you have an iPad - go grab it in the app store! It's free!
All of my notes are fully synced now and I just noticed a nice little zinger that Microsoft has thrown into the mix. Your first 500 notes are free. After that, you're required to spend $14.99 via IAP to continue using this fine piece of software.