This.
Cost me about $70, it's about the size of a pack of gum, and if I'm not too picky about sound quality it'll record about 300 hours if the AA battery holds out. High-quality digital stereo, 12 hours.
Stereo mics on top, pointing opposite directions. Mic jack and earphone jacks on top. Dime-sized speaker on the back. Cap on the bottom pops off to reveal a USB port.
That's my coolest recent gadget.
--t