Alright, that qualifies as a trickle. Signups now closed.
Unfortunately, we ended up at 80. I am going to try and swing an 80-person tournament (which will leave us, by my calculation, with 5 people instead of 4 in the semifinals) - but unless that works, we'll have 16 people left out. :(
I'll post round 1 once I talk to some TDs later tonight and propose that bracketing system.