OS X taking a photo with the iSight using a command-line tool?

"ImageSnap is a Public Domain command-line tool that lets you capture still images from an iSight or other video source. You might remember Axel Bauer's original isightcapture tool (that is no longer supported but still works on most systems). With ImageSnap I hope we'll be able to move forward and add features, adapt to the ever-changing Apple architectures, etc."

http://iharder.sourceforge.net/current/macosx/imagesnap/

wacaw looks interesting, andcommand line: http://webcam-tools.sourceforge.net/