Are you going to use this for business or for home use?
For the home my family and I keep in touch with ooVoo. Mom and sis live in Wisconsin, my brother lives in New Mexico, and my sister-in-law lives in Italy. For the Super Bowl my mom, sis, brother and I used our laptops and watched it together. Pretty interesting. The quality ooVoo brings is probably on par with some of the others out there. ooVoo is free per se. One on one you don't have to pay for it, but if you go true multicasting then it'll cost you some extra $$, but only one person has to pay for it as long as they are the ones setting up the session.