OK, so there are now several ways of using a smartphone as a PC webcam. Now there's a Mac solution too. The N95 blog reports on Movino, a S60 (or J2ME) solution for Mac OS X.

"Movino is a collection of applications for streaming and broadcasting live video from smartphones. The main applications are the following:

• A client for S60 smartphones
• A smartphone client for J2ME
• A gui application and a QuickTime component for OS X
• A video server for linux
• A drupal web front end

This has been developed during a project course at Åbo Akademi University. There’s currently no fixed plans for further development, but that doesn’t exclude the possibilty, if time permits and we find enough motivation.

The S60 client is used to record video and stream it to a receiving computer. It can encode data in a few different formats (raw YUV, abbreviated JPEG, MPEG for the video frames and AMR and μlaw for audio) and send them over Bluetooth or TCP/IP (over GPRS/EDGE/3G och WLAN). The lite version omits the MPEG encoder, reducing the size of the package."