My very favorite vacation so far was 5 days on Koh Hi (Hae), a resort island off the south east tip of Phuket, Thailand. For $70/day you get the deluxe beach house right on the beach. I booked through
www.sawadee.com
THere is pretty extensive coral right off the beach, in a roped off area, so snorkeling was always interesting. Meals are at tables on the beach, there is no internet and I never looked for a telephone. THey can arrange to pick you up from the airport in Phuket and take you to the pier, then the speed boat takes you to the resort. Do any serious shopping elsewhere, as the prices for disposable cameras, sunscreen, etc. are pretty high.
If you'd like more information, just PM me.
Kate