In light of all the "security" being implemented by the current administration, we ought to all grab Gizmo and Zfone and use them whenever possible. Gizmo is an IM-like VoIP (i.e. real VoIP using SIP, RTP, etc.) client and Zfone is Phil Zimmerman's (think PGP) contribution to VoIP security. It embeds strong crypto in the RTP stream directly, bypassing any filters or blocking at higher layers.
Gizmo: http://www.gizmoproject.com/
