The design that I have ran since the station went online in Oct 2010 the templates are the standard design, that come packaged with Cumulus
the software that gathers the information from the weather station.
Latest Cumulus version is MX which runs on Windows or Linux platforms.
The Ajax layout is PHP driven and dynamicaly updated. Not as easy to customize, but there is TONS of help and examples from great people in the Cumulus forums.