Changes planned for 0.4.4.8:

• Separate databases for private keys and transactions, instead of wallet.dat;
• Moving the public data to separate folder (e.g. move blockchain database to AppData\Local\Novacoin on Windows);
• Switching to UTXO storage (similar to used in the Bitcoin, but with extended metadata) instead of the current full transaction logs approach;
• Switching to deterministic keys, and possibly withdrawal of the keypool approach;
• Withdrawal of the Berkeley DB support (LevelDB is used by default for a long time).

This changes will be implemented in the 0.4.4.7 testing branch, the 0.4.4.7 binaries will be rebuilt and published sometimes, just for testing purposes.

Parts of this functionality are already available for testing.