There's a feature in TorrentStorm called "Initiate External Announce" that allows you to attempt to get a file of the exact same torrent structure (filename and piece file allocation) from a different tracker provided you know the address. I'm not sure if it accesses both trackers at the same time. I've only used the feature once, it seemed to work.
Comments
it doesn't do that for you
I don't know if you can
That's what I was thinking at first, but figured it wasn't possible becuase of this exact reasoning.
-drasnor