With gas prices what they are, I expect that we will start to see all kinds of new lightweight travel trailers popping up. The big luxury RVs just aren't selling as well and people are starting to think in terms of smaller & lighter weight models.
If it DOES happen - it hasn't happened yet. My wife and I went to a local RV show in february. Other than a room with about 4 or 5 pop-ups in it, there was NOTHING in terms of small light
trailers. All kinds of "lite" trailers of course, but I have a natural aversion to calling anything "lite" that's 30 feet long and weighs 2 tons.
It IS worth pointing out that although they weren't at the show there seems to be several new models of small lightweight stickies out there. They all seem to be ripping off the designs that Shadow Cruiser has been building for a few years now - with some minor variations. Par for the course in the RV industry.