wikis and html
The LKL hosts two wikis: the Learning and Technology in the Workplace wiki and Philosophy of technology wiki.
As for editing html. Again, you can start with Wikipedia, and follow the links. There's also a good tutorial on WikiBooks. A good site is WDG's html reference. If you want a bit more funk, Wired's webmonkey is a good place to start. You might want to bookmark there html cheatsheet.