I think this topic definitely warrants more discussion, and I'd hate to see a dichotomy form here over the schedule. I believe the idea, as we discussed a bit at last night's meeting, was that it's important to have a fixed and consistent time for meetings - having to look up the next meeting time every week would make it more difficult to have regular attendance. The believe the hesitation to moving regularly scheduled meetings to weekends is that weekends tend to be more volatile for personal scheduling, as that's typically time that most people end up doing things with family, going out of town, etc.
That being said, having a separation of business/operational meetings and meetings focused solely on hacking stuff is probably the best way to ensure stuff gets done at the business meetings.
Personally I don't have a problem with a bi-weekly operational meeting on Thursday evenings, and a hacking meeting every week on Saturday or Sunday afternoon - as long as the meeting time is fixed so it's easy to plan weekends around. If something comes up at a hack meeting that needs to be addressed at an operational meeting, it's easy enough to get scheduled for discussion then, and we can have the agenda available beforehand so anyone who can't make the operational meeting can weigh in via email and have their voice heard (though having an operational meeting with a bunch of emails and no people kind of inhibits any discussion about it at the time).
As far as getting decisions with the scheduling ironed out, these can really take a backseat to getting the space ready - no sense in arguing over when to meet in an empty room at this point.