Not sure if the recumbent bicycle crowd has a forum of their own. With so many cycling forums out there it's likely they do, but I decided to create one here just the same.
Thanks Kahuna for making Recumbent Forum. I enjoy riding recumbent bikes and recumbent trikes as well as an upright Tandem, and a recumbent tandem trike.
As far as recumbents go, there are so many varieties, geometries, and platforms.
The following recumbent links provide a lot of info for the newbie.
As far as a High Performance Custom Recumbent, CarBent makes a Fast bike under 18 pounds:
CarBent is coming out with a Dual 650C wheel this year also(Under 18 pounds) for those that don't like the 406mm wheel in front with 700C in back:
http://www.carbent.com/