ICE owners Chris Parker and Neil Selwood both came in person to the Recumbent CycleCon show in Cincinnati (Sep 25-27, 2015). They brought one of their surprisingly popular Full Fat all-terrain trikes and a representative lineup of ICE models:
Using the Shimano Nexus internally-geared 8-speed hub on any trike gives you the enclosed reliability of planetary-geared hubs, but it's a bit slim on gear range -- particularly with a small 20" wheel on