So although the disk, likened to a cartoon bubble or Mickey Mouse ear, only amplifies sound by a maximum of 10 decibels, the intelligibility of that sound is enhanced.

FORBES: Move up http://i.forbesimg.com t Move down

The first 2, 000 visitors at each park will get free "One More Disney Day" mouse-ear hats.

WSJ: For Some, All in a Leap Day's Work

If you're still with us, this PMP also sports a couple of flip-out mouse-ear speakers for use in a pinch, TV-out, AV-in, MP3 and WMA playback support, FM tuner with recorder functionality, and about 3 hours of video playback on battery which is about as good as it gets in a smaller package than both the current iPod and Zen Vision:M.

ENGADGET: Minox DMP-2 media player and MPEG-4 recorder

His science was behind the popular Internet download a few years back of a new human ear grown onto the back of a mouse, a photo that turned the collective stomach of a public still queasy about biotechnology.

FORBES: Plastic Man

His music also caught the ear of Isaac Brock, the frontman of Modest Mouse, who promptly signed him to his own record label.

NPR: Keb Mo and Mason Jennings in Concert

If you visit the Magic Kingdom at Walt Disney World Resort or Disneyland in California, you can now purchase Oswald ear hats, right next to those classic Mickey Mouse ears.

FORBES: Connect