A great collection of useful THAI infos:
http://www.thailandguru.com/index.htm

Tourist Info, Hotel Bookings & Transportation Links:
www.SAWADEE.com

Koh SAMUI Boutique Airport by Bangkok Airways:
http://www.bangkokair.com/about/?id=2&type=airport

International & Domestic Airport:  Suvarnabhumi International Airport
http://www.airportsuvarnabhumi.com

Thai Airports http://www.airportthai.com

RENTAL CAR: we recommend Budget Thailand ==>> http://www.budget.co.th
Driving Tour Map - Nakhon Sri Thammarat, Sichon & Khanom
http://www.phuket.com/budget/worldclass-drives/day3-long.htm

TAT - Tourism Authority of Thailand
http://www.tourismthailand.org

GENERAL INFO ABOUT THAILAND:

http://en.wikipedia.org/wiki/Thailandhttp://www.lonelyplanet.com/worldguide/destinations/asia/thailand
http://www.visit-thailand.info
http://www.aboutthailand.info
http://www.guidetothailand.com

ROYAL THAI GOVERNMENT:

http://www.thaigov.go.th/en/government/government_news.aspx

Thai Embassies & Consulats abroad:
http://www.thaiembassy.org

Ministry of Foreign Affairs www.mfa.go.th

List of foreign diplomatic & consular offices:
http://www.mfa.go.th/web/886.php

http://www.thaivisa.com/immigration_phone.0.html

THAI AIR TRAVEL LINKS:

Air Asia http://www.airasia.com
Air Andaman : http://www.airandaman.com
Asia's Boutique Airline - Bangkok Airways : http://www.bangkokair.com
Orient Thai: http://www.orient-thai.com
PB Air: http://www.pbair.com
TG - Thai Airways International:  http://www.thaiair.com

TRAVEL LINKS:

Bangkok Airport http://www.airportthai.com
State Railway of Thailand http://www.railway.co.th
Bangkok Metro www.bangkokmetro.co.th
BTS Skytrain http://www.bts.co.th
Bangkok Tourist Bureau www.bangkoktourist.com
Tourist Police http://tourist.police.go.th
Thailand Post www.thailandpost.co.th