Blackshift,
"The knowledge" is not that hard! It's just a big memory test. One of my old school mates is a black cab driver in London and I have sat with him many a time in the cab and we often joked with each other about how to go somewhere in the shortest possible time. I didn't do too bad most of the time and given constant practice I bet I could pass "the knowledge" test. Then again as a kid I used to prefer to read an atlas or a map as opposed to other things so perhaps it figures.
A good memory is all you need!
[This message has been edited by Flying Spider (edited 17 January 2001).]