[Asterisk-Users] IP to IP call without server?

[nkb]

> I'm not a big fan of supporting proprietary soltuions so I'd avoid
> Skype. However, what about Free World Dialup? Uses common sip clients,
> they have the new Pulver communicator which supports video, voice, and
> text chat. Seems like a good solution.
> 
What's the diff. between FWD and Skype other than Skype uses proprietary 
solution? I'm getting a little confused with these softphones and 
provider companies. I cant tell what's so great of one from the other. 
Is there something special about FWD I'm missing that make it better 
than other solution like Skype? Thanks!