Talkonaut

Talkonaut is about to offer all mobile users a combine of leading VoIP technology and outstanding IM chats based on Jabber (XMPP) protocol.
Talkonaut is the first application based on revolutionary GTalk2VoIP gatewaying technology and allows you to make voice calls to any Google Talk[tm] and MSN/Live Messenger[tm] users, to any SIP capable device or to other mobile or landline phones in a very cheap manner.
Talkonaut evaluates a unique portable J2ME framework technology developed by GTalk2VoIP TEAM, which makes it possible to run on almost any mobile handset with minimal MIDP 2.0 support.

Visit at:
http://www.talkonaut.com/