Agile.org has some create webcasts on subjects concerning Agile, Scrum. You can either sign up to them or go to the archive listing. Couple of interest are:
Agile Practices in a Traditional Organization
Adopting Test-First Development
Release Duration and Enterprise Agility
On May 15th is Agile and Quality: It is not an Oxymoron but a Necessity
Click here to check out the public webcast series.