DataFuse.net just finished reviewing DFI LP NFII REV B.
Here's a quote from their site: "The moment has finally arrived, the DFI Lanparty NFII Ultra 400 Revision B is amongst us. Many AMD enthusiasts all over the world have eagerly been waiting for this board to become available. I can easily say this board is the board everybody has been waiting for that's not willing to take the step to 64-bit computing. And why would you already take the step to 64-bit computing, AMD is still keeping prices high and since it will still take a while until software takes full use of it, I'm sure a lot of people won't mind sticking with 32-bit for a while."
Here's a quote from their site: "The moment has finally arrived, the DFI Lanparty NFII Ultra 400 Revision B is amongst us. Many AMD enthusiasts all over the world have eagerly been waiting for this board to become available. I can easily say this board is the board everybody has been waiting for that's not willing to take the step to 64-bit computing. And why would you already take the step to 64-bit computing, AMD is still keeping prices high and since it will still take a while until software takes full use of it, I'm sure a lot of people won't mind sticking with 32-bit for a while."