If my calculations are right, the following players have secured norms at the 2012 World Open. This isn’t comprehensive, but I don’t know of too many others offhand.
IM Marc Arnold - GM norm
IM Eesha Karavade - GM norm
FM John Bryant - GM norm (!)
FM Michael Kleinman - IM norm
Yaacov Norowitz - IM norm
Luke Harmon-Vellotti - IM norm
Notes: Arnold’s norm was locked up regardless of his last round against GM Eduardo Iturrizaga (drew; finished T-3 overall)…Karavade went undefeated…This is Bryant’s first norm of any kind…I believe this is Harmon-Vellotti’s second IM norm (2011 Philadelphia Open).