Article:
  VOIP on the Nokia 770 Internet Tablet
Subject:   the limit of your VOIP calling is to fellow Gmailers.?????
Date:   2006-12-16 02:41:46
From:   TomPotts
VOIP is a protocol therefore you should be able to talk to anyone who can support that protocol.
You may only be able to look up other gmailers but you should be able to talk to anyone whos IP you know. A quick e-mail exchange will allow you to find this out!
I'd drop any VOIP 'provider' who prevents you doing this - they're charging you for something you can get for free!