Hi Folks --
I also saw the Loas web site from the Bangkok embassy, and there's a bit of a contradiction on it, I think. First they say travellers from countries where there is a Loas Embassy or consulate "should" get visas before they leave those countries. Then, almost immediately below, is the list BobS posted above showing the crossing points where visas on arrival are available. I guess what they mean is that they recommend getting visas before travelling if they are available in your country of origin, but, if you don't, they will issue visas on arrival at the four points listed above? I also spoke to someone at the Embassy in Bangkok by phone. He was in the Visa section (extension 106), and he confirmed that visas on arrival were available for US and Thai citizens at the international entry points. So I guess they are available, but there is a bit of a conflict on their web site. Hope this is helpful.
We'll be going to Loas next week, and we'll post again with our experience with the entry/exit paperwork.
ericjt
Eric Taylor