Greetings, K'Tesh. I'm of the Clydely persuasion myself (5'9", 228.5 lbs on the scale this morning) and did a lot of searching before taking the plunge on folders. Give Bike Friday a call or drop 'em an email. Although their official "heavy rider option" tops out at 260 lbs, they have a video on YouTube discussing building a bike for a 340 lb rider - using some of their tandem components for reinforcement. BF's Peter Berra talked to me at length when I was just getting interested in folders and was worried I'd break anything that I touched. They're nice people and will let you know the lay of the land.

Full disclosure: I have no financial stake in Bike Friday and am not even a customer (...yet), but I've been impressed by their personal approach to customers both actual and potential.