Nasa Clickworkers

I was just reading about NASA clickworkers which seems to have shut down, but is an interesting approach to synthesizing input from lots of different individuals on the same problem, specifically identifying craters on Mars.

Associative PDA

I found a research thesis on an "Associate PDA" which sounds very close to my heart:

http://hci.rwth-aachen.de/materials/publications/falke2008.pdf