I put number icons next to the nodes that I thought news.yc people would find most insightful, taking into account the general interests of the group and what I thought people would already know based on the stories that get up voted here.
Also, the questions in bold are topics I thought would make good blog posts, albeit some are only tangentially related to what's in the book. If you find ideas in here that you think are useful, feel free to blog about them.
You can view the MindMap on the web via a flash applet here:
http://www.alexkrupp.com/earth.html
Or, you can download FreeMind 0.9.0 Beta19 and the original file here:
http://sourceforge.net/project/showfiles.php?group_id=7118
http://www.alexkrupp.com/earth.mm
The advantage of the latter is that you can navigate with the arrow keys and spacebar, and it's a lot prettier. (Go into Preferences -> Appearance and check "Edges start from one point at root node" for best results. Apparently the Flash applet doesn't have this functionality yet.)
Hope this is useful.