Do you have contacts on MSN Messenger, but prefer to use Google Talk? Why not open one IM instead of two? GTalk2VoIP
is an application that supposedly allows you to call regular phone numbers from Google Talk, as well as chat with MSN Messenger contacts. There is no software to install, just simple add the contact, service@gtalk2Voip.com, and you're ready to go. GTalk2VoIP is a free service, but there is a fee for outgoing calls to regular phone lines, which is determined by the provider your call is routed through.
[Via Google Operating System