I, too, have a Zoom H2. It's an amazing little device with so many features that I doubt I'll ever use them all.
Of particular note are the 4 microphones. You can select the front 2, which have a 90 degree angle of pickup, or the rear 2 which have a 120 degree angle of pickup, or all 4, for recording front and rear simultaneously. When you use all 4 you can record in 4-track or stereo. The 4-track setting uses a whole lot more memory, but you can adjust front-rear balance for playback. Additionally, you can use external mics if you like. I was going to get a larger memory card, but so far I have been recording rehearsals in MP3 only, and there is plenty of time available on the included memory card, so I haven't gone out to buy a larger capacity card (yet).