Have you successfully gotten an LJ Webcast? I signed up for one, went through the test that the site suggested, was told that I am fine and set up. But I cannot get sound. A bunch of PowerPoint slides are nice, but with effective slides (which is what I have seen for two events), you need to hear the talking!
Their web site has no contact for technical problems. The web regsitration has no info. Even the "partner" site providing the software/hosting has no tech contact info. You can "Contact a Solutions Expert" which sure looks like signing up for a sales call to me!
Library Journal Webcasts = FAIL
(And even their web site sucks. Very small print for the articles/blogs which you cannot enlarge, very, very long load times, and the RSS feeds only send a limited number of characters, not the full blog entry!)