The online guide was created back in 2003 and hasn’t received much love since then. It is a bit of a headache to update which is the main reason why. I have kept it on the site since it is still a somewhat useful resource (I removed it when we moved to the new site design in 2009 but a few people complained).
Ideally, it should be easily maintainable by the committee (like the rest of the site) and possibly even editable by the community as a wiki. However it takes a bit of work to do that migration. Volunteers with the appropriate skills are welcomed!