Webex? Breezecentral? Live Meeting?

We're looking for a cross platform way to present meetings over the web.  We don't need that much online Q&A, but that's nice, but basically we want a sturdy, glitch proof way that dial-up people to our meetings can look at presentations over the web behind a password. 

Which service to people recommend?

A lot of these free trials have ten person limits, too... that sucks.