IQ (Image Quality) Lab
E6, C41, digital printing, including lambda prints.
this is one of a few pro labs in Bangkok. The Silom branch has done a lot of work for me in the past year and they are quite good. Only had one bad experience. I dropped of some rolls in their night box, and the film came back with black spots on them. I guess the used my rolls to clean the machines at start up...? But I have to stress it only happend once and by now they have done more than 400 rolls of 120 film.
(A bit cheaper, but in a more inconveniant place for most travellers is Procolor Lab - check out the posting)
If you are going to shoot in Thailand and want them to do your processing just make sure you don't all hand it in the day before you're are leaving. They normally take two days to do C-41.
A couple of price examples:
C41 processing is around a dollar a roll, E6 2 dollars, Contacts(10*12) is around 2.50$ -cheap, huh!?
(Info: David Hogsholt)