Joe Kochanowski builds crazy-looking homebuilt recumbents that have “good ramming capacity in traffic.” My son Max calls this guy “bicycle Einstein.” “Who’s smarter than that guy? The answer is ‘no one.’ There’s no one smarter than him. In bicycles.” Linked from Wallingford (wallbike.com)’s blog.
From the same site as the Joe recumbents, (Jim Gallant’s Human Powered Vehicle page) is this kid-first triplet tandem, called a “trandem,” which gets the Max Nod of Approval as well. “That’s such a great word. ‘Trandem.'”