Sawat dii khrap Jobro welcome to FlyerTalk. I'm in Ko Samui right now... Just to let all Western Flyertalkers know --- airfares are so cheap here you can just go to the airport and buy a ticket from the counter.

As for HotWire and Priceline, I've always felt they're the last step of finding cheap airfares. Go to Expedia, Orbitz, Travelocity or Yahoo first to get an idea, then check out the specials on each airline's website, then finally put in a bid... works for me.