Nice solo-brainstorming Wal....good ideas I think. Just getting someone to foot the bill is, as always, the main problem with most good ideas

It would be nice to have an ROV mounted on a parallel vertical line that ran all or some of the dive, like the ones on wires they're using for F1 racing. There was something similar at the Atlanta Olympics for the running track too, if I remember correctly....very cool. The F1 camera does 100 kmh I believe!
Kirk K showed us a dock off the Vancouver coast that sits over a 200 metre wall. A big dock, with enough room for 200 spectators and a few big screen TV's.....that would be great!
Cheers from the toxic cloud,
Erik Y.