A lot of musicians use a [broken link removed] to record themselves. A friend of mine uses one, and for such a small device it is quite amazing.
I mention it because, unlike most dictaphones, which are designed for close proximity recording, you can make incredibly crisp recordings of someone speaking from the far side of a large auditorium with a H2. Also, and importantly, because the on-board mics are directional, you can avoid picking up every little rustle and cough in the room. Plus, because it can record in mp3 format, you can get up to 8 hours on a 2 GB card, and it's easy to transfer and file on your PC.
It might be a little pricey for the task you have in mind, they retail at about €200 in any music shop. You could pick one up in the states for far less, but will have to pay duty if it's posted to you.