Bad timing: skypecast goes MIA

When you think new media are today about introducing every more new stuff, you might be wrong. I have been working on getting Skypecasts, a service by Skype to allow large scale numbers of people to join calls, as a tool for the China Speakers Bureau. What we are missing are places and tools to conduct the debate on China issues, I feel (and will write more about this later).
Skypecasts seemed an ideal tool to conduct and record discussions, use them on our website. Unfortunately, this week the service has announced it will be over on September 1. I'm not as upset as the many people who based a part of their livelyhood already on that service, but it is not a nice surprise.
So, the obvious question: what is a good alternative. I have been using Yahoo IM in the past for this, but killed it, because it was killing my computers because of the capacity it used. Any suggestions out there?