I like the idea of a pass phrase based wallet, which would attract Nxt users to BTCD and vice versa.

Would the wallet work deterministically using the pass phrase? So if my computer went on fire I could log in on a brand new PC with just a pass phrase and my BTCD would be there? If so, how would this affect the current wallet.dat system? Will we have to generate a new account and send our BTCD to it?