All pages should have a notice saying that they are freely distributable. If you can not get such a permission from the author, please discuss this with the webmasters first. Good spelling is encouraged. Use the GNU Emacs ispell-mode if in doubt. The software's source code and executables have to be freely redistributable and modifiable to and by all people, companies, and organizations.
Substance is more important than style.
The use of graphics should be minimized, so pages load fast over slow links. The goal is to get each user quickly to what they want to find out, having most of the info on the first screen. This is similar to having the start of a Menu within the first 24 lines of an Info page. Offer a document in as many formats as the GNU Project has it. This lets the user get the document in the format most useful to him.