One also, get this, does not generally interface with a D2 via a proprietary piece of software (although you have that option if you want it)– one attaches the player via a USB cable and accesses it like any other USB storage. OTOH, it’s a little bit bigger, has a somewhat clunkier interface, and it appears to be extremely sensitive to being disconnected before it’s ready, to the extent that it becomes unresponsive if you don’t “stop” (windows) or “unmount” (*nix) it; as a matter of fact, mine doesn’t cotton to being connected to OS X at all. That’s fine, though, because for some funny reason I don’t have much in the way of .ogg and .flac files on my OS X machine …

Plus: a scientific calculator!