The Burley Travoy looks pretty interesting, for a cargo trailer.
I just happened across it while doing a little web crawling. It looks to be adjustable to fit any bike with a seatpost - pretty much all of 'em. It doubles as a hand truck. It folds up teeny-tiny when not in use. And with various optional bags and racks, it can carry a wide variety of oddball-shaped stuff.
Might be just the thing for my friend Tom, who was lamenting that there's no easy way for him to load his golf bag on his Bob trailer.
More photos of the Travoy in various deployments can be seen HERE.
(I don't believe it's available for retail purchase yet, but it looks like it's ready to rumble.)