Template tips: http://sites.google.com/site/sitetemplateinfo/

To add a public comments box to a page:

(from http://www.google.com/support/forum/p/sites/thread?tid=585c5ec8c9010383&hl=en#fid_585c5ec8c901038300048bdfbedb5cd7)

1. log in, edit the page you wish to add the comments box to
2. Insert > More Gadgets
3. search for “code wrapper”

4. paste the code from here:

   http://www.htmlcommentbox.com/

5. width: 100%

   height: 310 pixels

   uncheck Display title

6. save