Just come across this ...
"VuRoom enables Instant Multiparty Video Conferencing for Skype – an exciting new breakthrough, previously unavailable to Skype users. Along with its multimedia presentations and desktop sharing functionalities, VuRoom empowers you to collaborate real-time with remote users"
VuRoom is available for both Windows and Mac users and is compatible with ‘Skype version 3.0+ for Windows’ and ‘Skype version 2.0+ for Mac OS X’.
Buy VuRoom for US$9.95/month