These tiny, lightweight knives might make the perfect pocket knife for everyday use, and they're no doubt great for travel. Note: Probably not on planes.
Manufactured by Baladeo, the knife is available in two featherweight varieties, 22g and 34g, and performed pretty well in basic knife-related tasks (although, as Boing Boing notes, they are not workhorses).
The only "minor" issue they discovered while using the knife was that the locking mechanism slipped once and folded in such a way that it could have conceivably cut the tester's fingers. But it didn't!