Try IOCOM Visimeet (Score 1)

Hi, I work for IOCOM, but I really think you should take a look at our newly announced Visimeet service. It's exactly what you're looking for. Multi-platform; multi-party video conferencing; integrates with H.323 conferencing devices; works w/ webcams on laptops, desktops, in conference rooms, etc.; robust collaboration tools (desktop share, record meetings, chat, whiteboard, etc.); and, most importantly, a client/server conferencing infrastrucure that provides unmatched stability and security.

We've worked with many educational institutions with great success (and pride!). In fact, we were just deployed by one of Minnesota's largest K-12 school regions: http://minneapolis10.cityspur.com/2010/01/19/iocom-deployed-by-one-of-minnesota’s-largest-k-12-school-regions/

Check out our website at http://www.iocom.com/ and feel free to contact us, we'd be happy to discuss possibilties.

Thanks!