interesting proposition! I would think about a couple of places...
1. Bonaire (internet and phone service seem to be pretty good and diving is beyond amazing).
2. Puerto Rico (I have heard that the diving industry there is growing and should have all modern conveniences, internet, etc)
3. Playa del Carmen (probably the least expensive place to live, decent diving in ocean but also some cenote diving, modern but still rustic, I would bet internet is good there with all the new resorts recently built)
robin
