MS livemeeting
http://office.microsoft.com/en-us/FX010909711033.aspx
Live Meeting gives you the power to work together with colleagues, customers, and suppliers, no matter where you are. For online meetings, training, and events, Live Meeting is the effective meeting solution that enables you to collaborate with groups of three or even thousandswithout leaving your desk. With meeting attendees participating from their PCs, you can kick off a project, brainstorm ideas, edit files, collaborate on whiteboards, and negotiate deals at a fraction of the cost and hassle of travel.
Live Meeting provides unique interactive tools, integrates with your existing systems and productivity applications, and incorporates a familiar and easy-to-use interface that improves remote collaboration and enables effective meetings for companies of all sizes. And with the real-time collaboration capabilities in Live Meetingwith proven 99.99 percent uptime availability and always-on Secure Sockets Layer encryptionyou can conduct every meeting with confidence.