Documented my replyto code/tal at:

http://www.roundup-tracker.org/cgi-bin/moin.cgi/ReplyLinkForMessages

I tried to find info about zest. zest.sf.net redirects to
http://zest.wardsback.org/ which is not found. Google search for:

  zest site:wardsback.org

leads to code.wardsback.org, which is a code repo, but I see no zest
project. So that's a dead end.

The pydev sample url does still exist, but it's a two column display
with threading on the left and the body of the message on the right.
Personally I don't think it works well for a tracker.

Also since this is so old and Richard has left the project, I am going
to close this.