I love podfic, although usually I prefer to listen to something I've read in the past -- I tend to worry that I might miss something while listening. But I love it, for commuting, or sometimes on a long walk or run. I usually listen to stories in other fandoms, because I've found very little Spander. If you're interested, these are the ones I know about:

http://www.audiofic.jinjurly.com/category/xander-harris/spike

And if you are interested listening to other fandom stories, you can browse up at the top left of the audiofic site. In terms of what you read in particular, there's a lot of Sherlock, Merlin, and Sentinel.