Getting the newest iPhone or iTouch is definitely the best option here since it will have the Thai font ready to go!
But in case anyone is like me out there and has an older iTouch, I was able to take it over to MBK in Bangkok on that floor with all the cell phones and one of the stalls was able to hook me up with the Thai font and a lot of other neat Thai apps. It cost like 100฿ so I couldn't complain!
Cheers!
ทอม



