I have participated last year to the launch of a great website called beach-list.com by beta-testing and providing some pictures from saint barth.

This website is really great, tons of information, descriptions, maps, ratings about the best and beautiful beaches around the world. Very nice aggregation work!

everything goes in direction of preservation of the beaches:

Beaches take millions of years to form and even though they constantly renew themselves, if we want to have them for generations to come, we had best ensure they are well preserved. That means saving them from overdevelopment and keeping them in pristine condition so we can all enjoy them. A sign on a Belize beach sums it up best:

“Take nothing but photos, leave nothing but footprints.”

So, if you are searching for information about beaches everywhere in the world, have a look there!