I did a little experiment. I started recording and placed the Sansa Clip on my shirt. After 3 hours and 45 minutes, the clip was still recording. The wav file was about 600 mb in size. I’m guessing that the size is limited simply to free space (2GB max).
Fortunately, my Clip’s Auto-Power-Off function did not stop the recording.
No time limit, worked well for a meeting for me. In fact I was able to understand a speaker who was talking so softly I had trouble hearing live. I also have an Olympus dedicated digital recorder. This is more convenient, is voice actuated and easier to turn on and off etc., but had I had the clip at the time I certainly wouldn’t have bothered to purchase the Olympus. Strangely, the Olympus is rated for some un-godly number of hours of recording at it’s lowest fidelity setting, but the 2 AA’s would need to be replaced a couple of times during the session!