Got this email last week and forgot to post it; looks like some interest programs:
First of all there's an Open Source tool I'm involved in which basically
is a shell extension to compare two files / folders using any comparison
tool (you can also use different tools based in the file's extensions):
http://meta-diff.sourceforge.net/
The tool is based on BCShellEx which once was written explicitly for
Beyond Compare. Maybe you'd like to include a link to this tool on your
page, just as a reference.
Secondly, I'd like to encourage you to also review the "Diff Comander
Bundle Edition" (which also comes with "Visual Comparer") available here:
http://www.nikeware.com/