Looks like Boston cleared their waitlist.
Arizona has reached its advertised capacity too.
I count 2245 slots filled by 1640 teams (including that one non-team

).
That doesn't take account of the many remaining on waitlists of course.
If my math is close that means:
- (1640) 1st regionals & districts
- (169) Championship slots
- (98) 2nd district slots (with 130 Michigan teams, that means 32 haven't signed up for a 2nd district event)
- (338) 2nd (or 3rd) regionals
But those numbers are just off the cuff, so they need to be double-checked and verified.