Blog:

The World of IT
iX magazine, Heise Verlag (German only)
joint Blog with Nicolai M. Josuttis

Podcasts:

7 Jahre Agiles Manifest (7 Years Agile Manifesto)
Tonabnehmer 15 (German only)
Roundtable discussion with Johannes Link, Jens Coldewey, Henning Wolf (moderated by Frank Westphal)

Interview Jutta Eckstein
Software Engineering Radio, Episode 26
Interviewed by Arno Haase, Bernd Kolb, and Markus Völter on the agile manifesto, the role of personal relationships and trust in software projects, differences between agility in the small and in the large, as well as offshoring.

Agilität im Grossen (Agile in the Large)
Tonabnehmer 2 (German only)
Interviewed by Frank Westphal on agile software development with large projects