For those waiting, the A* example is finally in Git – it took me a while to do it because I’ve been pretty busy (sorry!).
It’s available in Git in src/examples/astar.c. Furthermore, it is built by default during the SIEGE build process (that is, unless it’s manually disabled) and builds into the “bin/Example-AStar” binary.
The example is rather crude at the moment because I didn’t have much time to make it, well, better. Maybe I’ll make a minigame out of it?
UPDATE 2011/03/31: A memory leak and crash at exit at have been found in the A* example (due to errors in the navgrid implementation itself) and corrected – thanks bernardh for bringing the problem to my attention!