The quickest way to add your ideas, provide updates, and so on is via the comments system. There’s (at least) one on this.
To make a more substantial addition to VolResource material, in the Updates section, there is also a pretty straightforward content form on the How to contribute page.
Anyone can also ask to be added as an author to an existing page – this requires signing up a site user and letting us know which page(s) interest you. Of course we’ll have to check that potential authors aren’t likely to be spammers in disguise.
Editorial discretion is retained by VolResource, but with a (hopefully) light touch on both comments and Updates.