Buy and install:
A few years ago, video skyping under linux would have been completely unthinkable. Just one more reason for me to finally get a webcam and test skype-2.0's video capabilities. Model: Logitech Quickcam for Notebooks Deluxe, which is reported to work more or less with both the gspca and the uvcvideo driver - and not too expensive, either.
I installed uvcvideo-kmp-default and libv4l in YaST, rebooted, camera was not found (kopete, skype), so I replaced uvcvideo with the gspcav-kmp-default driver. That worked.
Skype video support worked out-of-the-box on all systems, but the preview window is too small for self-testing. There are several webcam viewers for linux, but those were mostly incredibly old, didn't work with the camera or refused to install altogether (spent a wonderful hour resolving ruby dependencies with webKam).
kdetv displayed something (see image) on Archimedes (SuSE 10.3) after enabling the video4linux plugin (Settings->configure kdetv…->Video). Setting the Grab & Display Method to X11 (with shared memory) under Configure selected plugin… definitely improved the colour space.
On Tisiphone (11.1), I had no luck with kdetv at all, however, the Kopete viewer worked faultlessly. Oh, well…