Lately in my new role I have been hitting the traffic alot and spending considerable time driving both to and from work. To make the most of this downtime I have been downloading and listening to podcasts and other audio on my smartphone. Here are some of the links that I have found. No easy task, there is not a pile of content out there, so you need to hunt around a bit.
sqlbits – Over 100 downloadable presentations here.
Sqlserverpedia – A bunch of podcasts here.
SQL Downunder – Some great resources from SQL Server MVP Greg Low
Anyway I hope that helps, please share any other links that you may have for technical presentations/audio on SQL server.