Small digital recorder - experiences?

Have any of you used a small digital recorder that you are happy with? I need something fits into pocket nicely, records hopefully MP3 or some other compact format that directly plays on a PC. Goal is to record voice initially, not necessarily music, although thats an interesting option. Mike input option would be nice.

Ever tried using iPod for this purpose? Or some MP3 player?

Key are play back quality and ergonomics and small and many hours per battery set.

Seems like I read a Michael Fremmer column a month or two (or three) ago where he talked about just such a thing.... Maybe someone else will remember what it was, or you can find it in the Stereophile archives...... He really liked it.

Mike Fremer was using an iPod for interviews at CES, I did not ask him what company made the add on device.
I used one of these: to record therapy sessions for use in grad school presentations (I got written permission from my clients). It comes with software that allows you to download it to a PC (USB 2.0) in HQ .wav format or mp3, mono mp3, etc. I burned mine to a CD and presented in the TV/DVD-CD Player combo in the classroom. It sounded great!!! Best when I used the low sensitivity setting (Less background noise). Everyone else used portable cassette recorder/players that sounded pretty bad!!!! I looked like such a pro!!! =]

As far as playback on the unit itself, it would not work too well in a classroom setting as it would not be loud enough. It does have analog output (1/8 inch), so it could be plugged directly into something else for amplification.

I used disposable lithium AAA batteries and did not have to change them often.

I have tried the creative muvo pendrive-mp3 player. For voice recording: very bad quality, you really need to be in a noise-free enviroment and put close the device to the speaker.
I think, the best is for this purpose the already outdated minidics thing. A bit more bulky, bur runs on AA batteries, and one can attach any microphone. Even with a fairly low priced mic, one could make a very good quality recording (voice).
I believe that the digital recorder Michael Fremer loved is made by Sound Devices. They make both a 2-channel and I believe a 4-channel. Both are relatively expensive - over 2 grand I think, and while portable, not exactly sized to slip into your pocket. Also, you would need external mics. They're made for professional field recording - mainly film and television sound production. Sony recently came out with a great all-in-one recorder that has decent built-in mics, but it's also pricey at @ $1800.00.

I just read that Griffin Technology is making a cute recording add-on for the i-pod. There are others too. In between, there are a few recorders aimed at the musician market - like Edirol and Zoom. They have some useful features and the option of recording (theoretically) better sounding files in addition to mp3.