Kingdom-con is a gaming convention the lasts three days in San Diego. This is its 4th years and this year promises to have a lot of rpgs not to mention minis, board and card game.
In addition to tons of game they also have lots of prize support for all registered events including rpgs.
RPGs you are likely to see: Pathfinder Society, Dark Heresy, Marvel Heroic Roleplaying, Fate Core, Iron Kingdoms, Outbreak Undead, Shadow of Yesterday.
If you are interested in running an rpg please message me (http://www.meetup.com/sd-dnd/members/6418702/) and include the game you want to play and your email address. If you are interested in volunteering in other ways go HERE (http://www.kingdom-con.com/volunteers).
For more information and to preregister head over to the website: