Yeah, I already have the iThing worked out (see pics above) but I am looking to consolidate some things so I am specifically looking for an Android app to do the same thing.
If you find one, please post here with the details. I have an Android phone too so I would be interested in one as well. Any discussion I've been able to find on the subject says that there are some low latency problems with the Android OS that need to be addressed before an app can be developed.
I also have an old iPod. If I could find something like an iRig (just the adapter) that works with a simple MP3 player, that would work too.