iChat's screen sharing feature is wonderfully easy to use, but the quality leaves a lot to be desired. I frequently connect to my dad's iMac remotely to help him out with a variety of issues and have been using iChat thus far. Having become unsatisfied with iChat's performance at the task, I've come to wonder.. is there a better, higher quality solution available? Free is always great, of course, but I've been using this enough to justify a purchase as well. My dad's not the only one who needs (remote!) hands-on help with his Mac. Any suggestions? TIA!