Great !! I think this will also lighten the load (pressure) on Silverstripe and the community to keep the documentation 100 percent up-to-date. Take the php site for example ; the docs are more or less user-generated 'self-help' pages (usually I end up finding the answer in the comments rather than in the 'official' docs).
Just like PHP does , the comments would have to be moderated well and SilverStripe should have the freedom to edit/delete the posts.. Here is a part of PHP's charter :
* If you are trying to report a bug, or request a new feature or language change you're in the wrong place.
* If you are just commenting on the fact that something is not documented, save your breath. This is where you add to the documentation, not where you ask us to add the documentation. If you have an addition or change request, open a Documentation Problem in our bug system, where your idea can be discussed.
* This is also not the correct place to ask questions (even if you see others have done that before, we are editing the notes slowly but surely). If you need support send email to the php-general list, or see what other support options are available.
If you post a note in any of the categories above, it will be edited or removed.
Just to make the point once more. The notes are being edited and support questions/bug reports/feature request/comments on lack of documentation, are being deleted from them (and you may get a rejection email), so if you post a question/bug/feature/complaint, it will be removed. (But once you get an answer/bug solution/function documentation, feel free to come back and add it here!)
(And if you're posting an example of validating email addresses, please don't bother. Your example is almost certainly wrong for some small subset of cases. See this information from O'Reilly Mastering Regular Expressions book for the gory details.)
Please note that periodically, the developers may go through the notes and incorporate the information in them into the documentation. This means that any note submitted here becomes the property of the PHP Documentation Group.