"I had a quick look and I haven't seen any mention of using strips of bicycle tire inner tube. They can be cut small and are light so take up very little space. Of course you need a flame to light them such as a lighter or match but the purpose is to hold a flame longer than other tinders and in the wet, giving your other materials a chance to catch (which would be difficult to do using a lighter or match directly.)
Ray Mears uses this technique in the exceptionally damp environment of the rain forest http://www.youtube.com/watch?v=5fcMbAHLXBo"