I'm not sure what part of the world you're from, but in UTC we're still at December 27th, so the month isn't over yet. I'll known how much money Tarsnap made in December a few hours after 2010-01-01 00:00:00 UTC (since Tarsnap's financial year is January-December UTC), at which point I'll send the money over to the Foundation, a few hours before the end of their year (since they work on a January-December MST year).
And no, it won't be zero. Before announcing this earlier in the month, I checked with the FreeBSD Foundation and gave them an estimate of how much money they would be receiving, and they were perfectly satisfied with it.