Hi! I'm a little late to the party, but I hope I still have something to contribute!
We recently began a TAR rewatch, and while proofing some spreadsheet info I thought it would be nice to map out locations visited, and it occurred to me that Google Earth would be an excellent medium in which to do so. While I was searching for hints as to where Ban Plai Pong Pang might be, I stumbled across this thread.
Having taken so much from others in various forums, I'd like to give back a little. Here's the work I've completed so far, for races 1-3. Now speaking personally, I love the idea of attaching annotations directly to the kmz entries, but do not love the boxes that float on the screen when flying to the new location. So I have companion annotation spreadsheets for each race. In addition to locations, they contain clue verbage (original and/or reconstructed), confidence ratings (how confident I am that I have located each site correctly), and some justifications (particularly if my choice differs from Neobie's or GB's).
I'd welcome any comments, feedback and corrections as appropriate. My biggest goal is more information for everybody!
Update: See reply #108 for combined files for races 1-10.