Is the 23rd a lock? Also, please confirm location. I need to get a room. Don't want to have to leave early ;-)
Just a thought, how about name tags at the door. People can write down their screen name and first name. It would be nice to be able to put faces with names. I think it would increase the "cross polination" and comraderie if you know what I mean.
We can't have the hall on the 23rd, we can have it on Friday the 22nd, usual rules apply, or we can have it on March 1st (same weekend at MSBA show and that is even harder).