Could you possibly hack it?
One of the assets of the android OS is the ability to tweak it, hack it, or blow it out and reload.
I have an ipad which I love and recently recorded drums and keys into it using apps I bought on Itunes. I converted from mp4 to wave and imported into Sonar. I know this isn't lossless but it sounds good....I dropped a few more parts onto it a few days ago in Sonar.... at this point I guess I'm not far enough away from my big DAW to warrant wireless. The two can shake hands in other ways.
I think I would personally be happy with a wired touch setup for Sonar with occasional recording in ipad and importing to work on the song in Sonar.
If Sonar ever comes out with a Sonar lite kind of thing that is cross platform I'm on that like white on rice.