Honestly Xetick, you haven't ruined any carefully laid plans at all.
I'm still trying to make up my mind what to do, and all I have decided so far is;
1: Ask some of the core people here if they would be moderators.
2: Archive a lot of the inactive boards and simplify them.
3: Install a new anti-spam registration process (CK is working on this).
3: Make a new front-end.
4: Possibly convert to new software.
Vbulletin is really nice and that's a very generous offer you've made there we would be foolish not to consider it at least (even though the thought of moving the database over makes me scared!).
I've been promising myself to get stuck into this for the last two weeks and every time I've meant to do it I have been distracted.
This weekend!
And I may take you up on your kind offer for the Vbulletin license, especially if I can duplicate the forum with vbulletin on my box at home.
Cheers

K+