The New York Times' list of 31 places to travel to in 2010 ranks Thailand's Koh Kood at number 6, and implies that it might just become the next Koh Samui. Thankfully, it will be many years before Koh Kood becomes like Koh Samui, if it does so at all (not that there's anything wrong with Koh Samui but we can probably all agree that not all islands should be the same).
Koh Kood, and neighboring islands Koh Chang and Koh Mak, are becoming more and more popular all the time though, and for good reason. Read up about why Koh Chang is such a great place to visit.

Koh Kut is really a paradise island. Nice beaches, great hotels and fantastic scuba diving make Ko Kood to a wonderful destination in Thailand!