I'm out of town Thursday and would like to know what a capture party is so I know if I should hop on my phone and participate.

You can read about the capture party here. :D

By the way, capture parties are intended as a money sink (a way for very rich stables to use some of their extra cash). It costs at least $300,000 to enter the sweepstakes (capture 100 wild horses), not counting the stables you need to house 100 extra horses to the end of the party.

Yeahhhh, I noticed :p Maybe some day :)