I'm a now infrequent diver (just too busy!) but a couple of years ago when I was loyal to CO, I always used to fly to asia via Guam, and spend a long weekend there to do some diving with Micronesian Diver's Association ( http://www.mdaguam.com/ ). I've also been to Grand Cayman & the Keys. I'll be in Krabi & Phuket in January and I'm looking forward to a PADI Refresher for me & maybe a discover SCUBA for my wife. Anyone have any recommendations for dive shops there?