I wasn't sure where to put this, so I'm starting a new topic for this. Here's an interesting pair of tweets from a producer director of some of the international TAR editions:
Michael McKay @McKayActivetv 4h
Big week with 2 versions of The Amazing Race agreed for production in 2014 and 2 more likely. Busy, busy
1:48 AM - 15 Nov 13
Michael McKay @McKayActivetv 23 Oct
Channel 7 have opted to produce The Amazing Race Australia season 3 in house
I was going to suggest that TAR Australia wasn't one of the 4 versions he was referring, but I've changed my mind about that. Michael McKay lists Australia, Asia, Israel and the Philippines as the versions he has worked on. Since we already know about TARAus and TARA, I'm guessing that means TAR Israel and TAR Philippines are very possible.