Ahh, right, we forgot about Fring. Initially it didn't support the Nexus S front camera either when he initially got the phone, but it appears to now.

Also found Qik still exists as a separate app, even though Skype bought them in January.

Seems strange to me that Android apps aren't seeing multiple cameras properly. On the iOS side, every app I tried that could use the camera automatically had support for the front and rear cameras without needing a specific update.