Teleconference between three or more people on Skype

Actually Skype themselves have now come up with a multi-user (up to 9) video conf. Tested it last week and it looks fine. At this writing it's in Beta, with a "free trial", though I can't see how they can charge for it while it's still in Beta...

http://tinychat.com/

It's a web app so no software to install. It includes a chatroom feature and offers you option to record the conference. I find it pretty cool.

We've used WebEx at work with good results in the past. Supports both video conferencing as well as desktop sharing between clients. People can even dial in to a conference over the phone if they don't have a microphone.

Since you've said this is work-related, the cost at $49/month may not be too bad.