okay, so say someone *accidentally* sent some coins to cryptsy before seeing that they were on the wrong blockchain... what would happen to said coins? Thanks!
I'd do what valkir is suggesting. All addresses for Teslacoin, whether made by a wallet on or off the chain, are still valid addresses so they should have the private key for that address. That means you should be fine, as long as they update their wallet to the correct block chain.