Those are the two changes I'd really like to see Zune add to future updates. An audible Low Battery warning (the current one is visual, only works if you're watching videos) and Audible.com (.aa) format. I've got two of their George Carlin audiobooks that I'd love to listen to again.
Note to self: It may be time to consider an external battery pack. Or an extra charging cable to leave at work.
