Check this link. It says they did the Drake Passage in a hobie cat. I know it wasn't a stock hobie- it was carbon fibre if I'm not mistaken and had little pontoon platforms to sleep on. I remember reading about it in the local marine press at the time. After all the modifications I guess it's hard to still call it a hobie cat! They have left across the Pacific on a 25ft catamaran- presumably similar to the other one. These guys are fantastic!
Here's a link: