Boerkie, we are going to give you an award for being the top idea punter on VE!
A list of caves similar to the existing list of passes is in the making, started it a while ago but it'll take a little more time before I'll publish it.
The idea of a page being editable by all members is the core aspect of a wiki. So the newly published
Maloti-Drakensberg Wiki was launched with that in mind.
As for certain blogs/articles on this site being open for all to edit, that is ideal. Attention is certainly being given to Access Control Lists (ACL) in the development of Joomla (the content management system this site runs on). In practical terms this can means it becomes easier to assign customised permissions to a group of users to a certain article. I think is already part of the newer versions of Joomla and would certainly then be easy to implement with VE's next major site overhaul.