I'm not going to make my decision until much closer to the date, and the complete information is available. But if it's a couple of hours, so be it, no biggy.
I can see why other pin vendors might not be so keen, but then I suppose it's a balance of cost recovery against making everybody happy.
The last thing I'd want is too much negativity (but fair discussion is a very good thing) as I can't see this repeating if we are all too negative about the proposal for its format.
As Gavin said, lets hold for tomorrow's web site update to get a better feel for what is happening.
