There can't be many people reading this that haven't heard of AlpKit. It seems that they've pretty much got everything you could want for nights out under the stars. Quality bivy bag at the right price, performance down sleeping bag for the price of a synthetic one, titanium cooking gear ... like I say, all your bivy essentials. The new Airlok XTra dry bags should be of great interest as they feature loops on the outside which allow them to be easily strapped to your bars / frame, etc ... the ultimate in lightweight baggage perhaps.
If you're in the market for equipment for the wrt or any other trip then pop over to http://www.alpkit.com/ have a look around and get yourself sorted.