I just found this site, ScubaSeasons.com Scuba diving season map and search tool and thought I'd share it with you guys.. It's relatively new but I found it really useful, as it's easy to use and gives an overview of places to go diving really quickly. You can search by month, aquatic life (I'm always in search of Whalesharks), type of diving and the price you're willing to pay for it -and voila, it shows you on a map wich dive locations are in season and fit your criteria. Pretty neat! You can also leave reviews for locations, divesites or even resorts/diveshops.. Give it a go!