[Mark McLeod]

Only four teams away from the number that played last year.
P.S. Reached 1808 about a day later, just before 9am EST on 11/16, the same number as played in 2010. We haven't matched the peak of 1826 from 2010 yet though. Usually, the list of teams falls back a bit from it's peak within a week or so of registration closing.
The Wisconsin Regional is also now at initially advertised capacity. That means 10 Regionals are still open book, plus the Texas events immediately show Texas teams that fit their criteria.

I'd hazard a guess that an additional 30-40 teams are simply invisible while they're cooling their heels on waitlists, and with some of the known late registering areas, i.e., Israel, we'll easily have more teams than last year. Probably not exponential though. This is definitely a slow growth year, but we'll still probably break 1900 teams.
We do have more rookie teams (280) than last year (277). Not so many resurrected vets (9) as last year (21).

P.S. I'd also guess that there are ~150 teams on the Championship waitlist, based on last year's numbers, and this year's drop in available open slots.

Here are where the missing ~300 teams are from and by their rookie years.

Still missing by rookie years (rookie year/# missing/as a % of teams remaining in 2010 from that rookie year):

1998 & earlier -- 3 --- 3%
1999 ----- 5 ------ 8%
2000 ----- 10 --- 16%
2001 ----- 1 ----- 1%
2002 ----- 6 ----- 7%
2003 ----- 5 ----- 7%
2004 ----- 18 --- 17%
2005 ----- 28 --- 24%
2006 ----- 25 --- 17%
2007 ----- 38 --- 22%
2008 ----- 31 --- 14%
2009 ----- 63 --- 23%
2010 ----- 61 --- 22%


Missing by location:
Israel ----------- 41
MI --------------- 21
NY --------------- 21
TX --------------- 21
CA --------------- 15
MN -------------- 15
OH -------------- 10
CO --------------- 9
FL ---------------- 8
IL ---------------- 8
Canada-ON ----- 7
HI ---------------- 7
MA --------------- 7
NJ --------------- 7
VA --------------- 6
AZ --------------- 5
GA --------------- 5
IN ---------------- 5
LA --------------- 5
NH --------------- 5
PA --------------- 5
WA -------------- 5
DC --------------- 4
SC --------------- 4
UT --------------- 4
CT --------------- 3
MD --------------- 3
MO --------------- 3
MT --------------- 3
NC --------------- 3
OK --------------- 3
OR --------------- 3
TN --------------- 3
AL --------------- 2
KY --------------- 2
MS --------------- 2
NM --------------- 2
NV --------------- 2
WI --------------- 2
AK --------------- 1
Canada-AB ----- 1
Canada-BC ----- 1
Canada-QC ----- 1
KS --------------- 1
ME --------------- 1
ND --------------- 1
PR --------------- 1
Turkey ---------- 1