trying to figure out my voip options with the n800, and am a bit confused. i'm looking for something that has/is:
1. free
2. can call landline or computer, and get incoming from either.
3. use video
4. pref open source

i realize i won't get all of the above, but am not sure of the difference between clients/services. i'm curious about gizmo, which i thought was free-after a couple of calls, my acct now has a balance, although they have no way to bill me...