I'm curious about all these other chatting clients. Surely you'd need a client that all your contacts run? Skype is soooo universal these days, even if it's not yet optimised. I'd love to try out something like Vtok or Oovoo, but I can guarantee 100% of my (extensive) contact list will never of heard of it and have it installed. A shame. So, is there such thing as a cross-app video calling? Can I use my skype account to video call face time peeps, or yahoo peeps, or oovoo peeps, and viceversa etc etc? This would be awesome.