If you give it any special abilities through scripting, however, these won't carry over unless the two servers have the same scripts running in their modules. Not sure what has been said, but no. Many things are still in flux and we don't want to give out to much invalid information. We would more rather get it right and then provide it in a final working state. We are still working the details of what kinds of information can be transferred between servers and modules.
Balance is a tricky issue and, ultimately it's going to come down to playtesting.
Even if we were able to follow 3e to the letter, the balance would be different. In PnP, each combat takes much longer than it will in NWN, so that throws the balance off right there. We compensate where we can in advance but the real balancing happens once most of the game's already in place. We're working on the list now. They will be similar to the ones in the DMG probably.