Hi all, I made use of ZeoGraph to make a quick island generator.
Here's the graph itself, I hope it comes in handy for someone looking to make an island.
http://www.davidwaltersdevelopment.com/share/Island.zgraph
Simply double click the values on the left to control the map size, noise key (try various values to get different islands) and some controls over the base and crag / ridge heights. There are a also few other values that you might want to tweak such as the offsetting used to submerge the edges of the island and the 'power' operator applied to the crag layer.
Regards,
David Walters