There is a lot of information on the Web about the Pinewood Derby

The U.S. Scouting Service pages have a lot of information about the
Pinewood Derby, see:  http://usscouts.org/pinewood/index.html

Also see the  Pinewood Derby Racing Webring, a small group
of excellent  Pinewood Derby sites.  Many of the sites are extensive,
and several have  Pinewood Derby track plans. Several have information 
on running a PWD. 

The ring index is at:
   http://www.webring.org/cgi-bin/webring?ring=pwd&index