Here are a few more resources (blogs and websites) on Roatan handy for you planning your trip.
Bloggers talking about Roatan
http://laurazera.com/2011/02/bay-islands-honduras/ - In this blog Laura talks about making the choice between Roatan and Utila and if you too cant make that Utila Vs Roatan choice then here it is. Its all you need to know really.
http://laurazera.com/2011/02/swimming-with-the-fishies-in-roatan-honduras/ - Now we get to some fish action and we know the readers of this site like them.
Native islander of Roatan, Steven Hamilton can show you round virtually via his impressive website Discover Roatan.
There is a particularly nice video page here - https://www.discoverroatan.net/roatan-video-gallery/