It's called Audio Osmosis and it's by Examkrackers. If you spend lots of time in the car I would say that they'd be worthwhile. The bio will not cover plants, animal behavior, or ecology, but will cover genetics, microbio, and human physiology (pretty well IMO). The ochem review would be good too. The chem is probably not useful (too specific and difficult). It's expensive though, and limited for the DAT. I sold my copy on Ebay for $100 and that seems to be the average price there.
There's also another audio CD program for the DAT but I don't remember what it's called.