The folks at the No Fluff Just Stuff conference (authors and editors of the great book No Fluff, Just Stuff) have a nice series of podcasts on various topics that have been presented at their shows. Some of the podcasts seem little more than marketing slicks to whet your appetite for signing up for the conference, but all have at least some useful bits in them.
Neal Ford's talk on Metric Driven Agile Development was one particular cast I wish would have gotten more into details. Venkat Subramaniam's Open Source Agile Tools is another short one, but has some goodness on specific tools -- the specific tools he talks about are Java tools, but a number have .NET equivalents.
The series is available via the site or iTunes subscriptions. They're nice fillers for my commute and well worth the download.