I saw them, there were probably 8 or 10 or 12'ish. Ron Paul supporters made sure to line up in front of them with their big Ron Paul signs and block them. They were quiet and left about ~40min in to the speech. Their signs said things like 'Ron Paul opposes women's right to choose' '...opposes workers rights' '...opposes civil rights' '...opposes public education', etc
They probably never dove more in to the guy than what their friends said about him. They seemed really overwhelmed and didn't respond to anyone I saw, directly. Definitely a small group of people who haven't ever heard the man explain his positions, just some people holding signs because their friends were holding signs.
I think this is their website: