I've used David R. Lee for a couple of tickets. $75 and he's been able to get them dismissed every time for me without a trial.
http://www.thatticketattorney.com/How these guys work? As near as I can tell, it simply is recognition that no one actually wants to take one of these cases to trial and tie up a courtroom for the afternoon. The city doesn't really care about the crime and punishment aspect as much as they do the money side of the equation unless there is something especially egregious about your ticket. But once they see that you have an attorney and are willing to go to trial, the prospect of easy money disappears. At that point, it is a lot easier for them to dismiss and move on to the 98% or so who don't bother fighting their tickets.
[This message has been edited by PetroAg87 (edited 1/23/2012 9:07a).]