For those of you that use a cheap blue tarp you might like what Tinny turns one into. This first video shows it done and the others are how to make it.
http://www.youtube.com/watch?v=0fXDcFfNwLshttp://www.youtube.com/watch?v=NnO4Nplk9m8http://www.youtube.com/watch?v=3vRceEXBm3Mhttp://www.youtube.com/watch?v=hUHRFnJ7JJIhttp://www.youtube.com/watch?v=lmWtZZvD22khope you enjoy!
But if you are looking for a lightweight tarp and are handy with a sewing machine there are many lightweight backpackers that make their own out of silnylon and some go as far as making a hammock to go with it. It is amazing what you can make very easily and cheap.