So it sounds like you dont have to get any visa in advance of arrival at the airport? I am staying less then 30 days but if I need to sort things before I get there any info would help, thx!
Hien put together a very helpful post at the top of the Asia forum; "FAQ Thailand Visa". Your answer will be in that post. Basically, Thailand will issue you a free 30 day entry permit when you arrive at their border, airport or land. The countries are listed that qualify for the 30 day entry permit. Citizens from other countries receive a 15 day entry permit. Citizens from some countries must get a visa before they arrive. You did not list where you are from, so I am guessing. Most western countries qualify for the free entry permit. Most African and some South American countries do not.
If you want to use the TP forum as a resource, you might want to add some details to your profile page. It will aid members when they try to assist you. Good Luck to you.