Here is an interesting project that I spotted on Treehugger. Steve runs a kayak company on Canada’s west coast. In his spare time, he is building and refining a velomobile that is based on a Hase Kettwiesel recumbent trike. Steve started out with the simple goal of making a replacement fairing for his Vision recumbent, but the project escalated into something a bit more extensive. The velomobile’s progress is well documented on his website. It is definitely worth a look.
While on the subject of fully enclosed recumbents, don’t miss Gene’s excellent post on Biking Biz about the quest for 80 mph on a bicycle. Very interesting stuff!