Ekiga on Ubuntu:
Tested using fresh 32-bit Ubuntu 10.10 on Shuttle SN25P with AMD core, with old Logitech ball-cam. Install using
sudo apt-get install ekiga
If no sound or microphone, go into Preferences/Audio/Devices and set all devices to Default(PTLIB/ALSA).
If no webcam video appears, go to Preferences/Video/Devices and set Input Device to Camera (PTLIB/V4L2) and NTSC.