I find the terms "frontend" and "backend" confusing when applied in this context.
also, links to the standard parameter types would be extremely useful. http://docs.joomla.org/Standard_parameter_types
Overall, I found the article extremely useful.
Commercemeister, thanks for your comments. Could you please explain what you find confusing about frontend and backend? They are commonly used to refer to the main site and the administration parts of a Joomla! website, respectively. It would be helpful to know how you think they should be clarified (or you could even just do it yourself - that's the beauty of a wiki!). Thanks too for the note about parameter types - the article did originally link to a page with this information, but then that page was changed. I will update it.
One final point - please sign your comments using the four tildes at the end (~~~~). Thanks, Mike 16:18, 3 September 2008 (EDT)