Oh those shirts are CUTE, surrrre the first year I'm not there they have cute shirts. Not that ours would look like the PNM's, but they usually look somewhat similar. 1000 girls is about average, I think actually more than 1000 went through last year and the year before, but I could be wrong. I know that ever since I've been on the rusher side (fall 2002) there has always been at least 1000 girls. Quota is normally 65, and chapters that don't meet quota on bid day always snap bid to quota within the next week.
Good luck to everyone going through at Mizzou and to all my girlfriends in all 13 houses, Mizzou recruitment is such a fun (but insane and stressful

) time!
ETA:
Exlurker, all the PNM's get two matching t-shirts (just different colors for different days) when they register and pay for recruitment. One is worn on the first day (16 party day) and the other is worn on the third day (5 party day/house tours). Sundresses, capris, etc. are worn on the second day (9 party day) which is skit day and then nice dresses for pref.