Due to interest generated by an earlier post on the advantages of using high quality audio recorders for field research I am posting this recently published comparative review of digital audio recorders from Wired magazine. Note that I haven't used any of these reviewed recorders and moreover I don't think any of them record in stereo, which is a key advantage of the Samson H2 in my original post.
Video Recording
Along the same lines, I did an earlier post on the pros and cons of high definition video-recorders. Well, here's a follow-up review of tape-less video-recorders from the New York Times. It discusses the Sony/Panasonic used AVCHD format specifically designed for tape-less, high definition recording.
Addendum (Oct 12th) - I left out a link to one more useful review of high definition video-recorders from MIT's Technology Review. The Sony HDR-CX7 HandyCam has great video quality, but lackluster editing software:
Review: Sony stuffs top-notch HD video into small camcorder, but included software falls short