From the developer:
Yeah there was an issue with the tool I used to build the app that crashes in IOS6. I pulled the app, but it's $400 to re-build it with the fix, and I'm sort of out of the IOS game for now.Looks like we're out of luck for a while.
If you know anyone who does monotouch work, I can provide access to the repository/code.
I am taking development proposals from anyone out there that wants to work it up into a nice product.