An option for sorting by edits?

[Warlitz]

I will be more clear, what I mean is that you know when you are looking at the forum wall (Like in this case when you see "Site & Forum Feedback" where there are a list of threads) you can sort by creation, subject, etc. Why not also by edits? This could come in handy with info pages about groups, as they can be posted somewhat recently and have no changes or be posted a long time ago and have been updated recently