I found two more WSOP bracelet holders lurking in the field under baseball hats.
Eric Buchman just won his bracelet last summer ($2k Limit Hold'em).
Ryan Hughes has two bracelets, won in 2007 and 2008, both for Stud Hi/Lo.
Ryan Hughes and Eric Buchman
Both happen to currently reside on table 17, which they are sharing with Borgata tournament regular Joanne Monteavarro.
Now on to the subject of WPT titles-holders playing today.
Victor Ramdin has one, Cornell Cimpan has two, Michael Mizrachi has two, Yevgeniy Timoshenko has one. That's all I know about in today's field.