Actually Thailand gives out 30 day visas...at the end of 30 days you can make a visa run to any country ouside Thailand (usually Cambodia or Laos) and get your passport stamped and return the same day...you can do this only 3 times a year and it is STRICTLY ENFORCED...a senior citizen which is anyone over 50, can apply for a visa prior to arriving in Thailand and get one for a full year...so long as you have money in a Thai bank, I think minimum is 20,000 bucks but you can pull it out at anytime you want...
I agree that Costa Rica will come to its senses and will adjust their thinking...too late for me since I will be leaving in March for 9 months and return to Costa Rica again in January of 2010...
If you have 30,000 baht to spare, a 1 year ED visa can be pretty easily obtained. And let's just say you never need to show up for any of the classes.
Several companies do this throughout Thailand.