Found a TI-er in local pool!
Was sharing a lane last night with a bloke who was doing some very odd-looking things in the water. Instead of alerting the lifeguard, I ventured to ask if he was doing TI drills, and he was :) This is actually quite exciting, as I've never met another TI-er in real life!
Unfortunately, he only had "the yellow book" as a guide, and was rotating to stacked shoulders, and it all looked a bit unstable, but I didn't want to poke my nose in on the first encounter... I suggested he get one of the newer DVDs.