I noticed this earlier. They are:
"Regular Event and reduced number of players side
events *"
"*Note that smaller tournaments will start 4 and 8 minutes after the big event. Small tournaments only allow 250 and 100 players."
http://www.partypoker.com/news/event...y_schedule.htm
I must admit I do like the idea. Gives you a chance to play a lower buyin tournament against a smaller field.