Before the show started last night. I like to give everyone a chance to see the contestants in a reality show for one episode before having their picks in. That's tricky on a show like SYTYCD where they have an audition phase first but I felt like once we learned who the top 20 were and saw them perform on the show last week, we had enough information to make our picks for the pool.
So for future reference, when I set a registration deadline, you should have your picks and any changes in before that date. Of course, if you have some unexpected emergency occur (computer crashed, etc) or you were on vacation and got back the day after the deadline ended, notify me by private message and I'll let you join late. Sometimes I'll start a pool team with a penalty or zero points for the first week if they had no good reason for being late. I want to be fair to the people who did get their teams in on time and discourage procrastination.