The SXEmacs web site content is kept under the same version control system as SXEmacs itself Version Control. That means that anyone can submit changes and updates to the site in the same manner that they would for code submissions to SXEmacs See Patches.
There’s really not much more to tell about the web site. It is just your normal run-of-the-mill web site. And as everyone knows, HTML blows goats so it doesn’t get updated anywhere near as often as it should. We do have a Webmaster, so if you do have any comments about the site, you should direct them there. Or, alternatively, SXEmacs Devel mailing list.