Yes there is Gizmo, and eventually Skype, but Google Talk is the default and most integrated IM client for the Nokia IT. I just stumbled upon Gtalk2VoIP.com, which will connect google talk to SIP and recently yahoo and msn. It is not as simple as it should be, but it was cool to receive a phone call on the tablet. Simple steps: You add their chat bot to your GTalk contacts. It will send you a link to your account info. This page includes your SIPBroker number, and links to real phone numbers around the world that will connect into the SIP networks. I called one of the New York numbers, entered my SIPBroker ID, and the call was connected to my Nokia. Gizmo also worked when I called the New York number and entered my Gizmo SIP number. Yay for standards!