On the page given above, the first section following the table of contents contains a link titled "How to compile Samba" which points to the same URL. In the docs contained in the version of Samba I just downloaded (3.0.14a) in the file samba-3.0.14a/docs/htmldocs/Samba-HOWTO-Collection/install.html it instead points (apparently correctly) to compiling.html.
I guess this should actually fall under Samba.org contents.
This has been fixed. The next build should be OK. Thanks for the feedback. - John T.