Ko Samui <font size="-2">
http://www.lonelyplanet.com/destinations/south_east_asia/thailand/attractions.htm
This beautiful island off southeastern Thailand is covered with coconut plantations and circled by (call us clichéd but it's true) palm-fringed beaches. It was once an 'untouched' backpackers' mecca, but is now well on its way to becoming a fully-fledged tourist resort. Coconuts are still the mainstay of the local economy, however, and up to two million of them are shipped to Bangkok each month.
The most popular beaches are Hat Chaweng and Hat Lamai: both have good swimming and snorkelling but are getting a little crowded. For more peace and quiet, try Mae Nam, Bo Phut and Big Buddha on the northern coast. The main town on the island is Na Thon.
Most of the beaches have plenty of rustic, thatched-roofed bungalows, but accommodation can still be hard to secure in the high seasons between December and February and July and August. The best time to visit is during the hot and dry season between February and June. There are flights from Bangkok to the island's Don Sak Airport. Several ferry and jetboat companies operate from Surat Thani: express boats take two and a half hours and jet boats take one and a half hours. Local transport comprises songthaews (trucks with two rows of seats in the back), though several places hire motorcycles.
Ko Samui's northern neighbour, Ko Pha-Ngan, is more tranquil, and has equally good beaches and fine snorkelling. Its renowned beach parties at Hat Rin are still popular with backpackers, although sadly, the beach has deteriorated recently with overuse and poor environmental controls. The island is a half-hour boat ride from Ko Samui</font>
More links
http://www.kohsamui.org/samui.html
A web directory of Thai travel services
http://zeal.com/category/preview.jhtml?cid=296017
Thailand search engine
http://www.thaipro.com/dir/Koh_Samui/Koh_Samui_Images_1.html
I hope that helps somewhat
I still havent booked our flights! Must do that first thing on Monday.