This lecture is worth the effort of getting a password to Medscape. The site has you listen to the audio and look at the slides that the audience saw. You can even pause the show and come back to it. It was sponsored by TAP

http://www.medscape.com/viewprogram/4715?rss

This one requires no password:

http://www.mastersofpediatrics.com/cme/cme2004/lecture16_1.asp

If you find others, please let us know.