nah. It doesn't convert commands, which would be difficult to do (same like sublime - it only supported things like tm color schemes, some snippets).
The TM bundle is basically a bunch of php.
Though its not particularly difficult to dupe the functionality. You'd have better luck reusing some of the code from the desktop theme tool (though i wouldn't bother - would just start fresh since you will have node available in atom)
def looking forward to playing with atom.io :)