+1 for SE radio. That is the only one that is consistently stellar.
Also try the podcasts from undergraduate comp sci courses... stand by for links.
http://webcast.berkeley.edu/courses.php
and
http://ocw.mit.edu/OcwWeb/Electrical-Engineering-and-Computer-Science/index.htm
they can be found in itunes
Note that many of the other podcasts might be "lighter" listening. SE radio and the courses do require a bit more attention and the others may be more suitable for what you want in that type of environment.
As for audiobooks, you should find what you want to read/listen to then go to audible.com or another such site to download the books.
My local library has a collection of audiobooks - on cd (I rip them) and in ipod format. I have not checked for technical books and I suspect those would be impossible to find at a local library.