A number of young players known just as well or better by their online handles have dipped a toe into the Omaha/Stud hi-low event. Most recently spotted: Aurangzeb 'Ozzy87' Sheikh, who's only just legally able to take his seat in WSOP events. His table might not recognise - yet(even people he's tangled with online might not) but he's definitely one to watch.
More players of note:
CK Hua
Perry Friedman
Lee Childs
Jason Mercier
Thor Hansen
Vitaly Lunkin (fresh from taking down the $40k Anniversary Tournament bracelet)