There are links to some papers on D* here, but they're a bit too mathematical for me. Is there any information on D*/D* Lite more geared towards beginners?
Wikipedia has an article on the topic: http://en.wikipedia.org/wiki/D*
Also a D* Lite implementation in C is available from Sven Koenig's page: http://idm-lab.org/code/dstarlite.tar However I find the impenetrable math much easier to read than the C source code ;-)
Another implementation of D* Lite (in C++) is available here: http://code.google.com/p/dstarlite/