I’m trying to find ways to improve the audio quality of my videos without hurting my workflow. Ive been playing around with this device for the last week, so far so good. Think of it as a Swiss Army Knife for Digital Audio, comes with 2 directionally controlled on board mics, and will accept 2 external mics, of all kinds, XLR, mini, etc. Records to an SD card and runs on double AA batteries. So far it has helped me speed things up on the 7D DVD. If you are looking for a quality, self contained audio device, this is something you should look at:

Zoom H4n Digital Audio Recorder