OK, the Pinwide might not be a micro four thirds lens so much as its a cap, but its end function is the same: it allows you to take pretty-looking, wide-angle shots of objects through a tiny aperture.
In addition to its super wide 11mm lens (equivalent to 22 mm on most DSLRs), the Pinwide cap has an infinite depth-of-range thanks to its f/96-f/128 aperture range, which snaps into your camera body the same way a lens would, and can lead to some very interesting shots (so say its makers). And its only $US40, so it’s not like you have to take out a second (or maybe first) mortgage to pay for this thing. [Wanderlust via Gadget Lab]