Once designed and created a system to manage very complex ethnobotanical information, so we could define rules like "X company reserves all samples taken from Q parts of plants that might be related to people speaking Y language from Z area using words that hint at it helping their stomach."

Another system - "it must tell us everything about e.g. nanotechnology and Japan". Recognised countries, technologies, projects, did implicit search on internal document databases, internal project databases, CIA world factbook, stored URL's, Google's API etc. Showed links, e.g. team X went to Japan in 2004, team Y dealt with nanotech in 2001, there are two reports here that deal with X, Bob stored these related URL's, etc.

May not impress some, but I really enjoyed those projects and they were helluva challenging!