Yes, this would be nice. And not as a graffiti wall, but as text entries that could be listed and sorted. We have planned to put something like this on our site for ages, even though I don't have the time to code it so it would just be a simple text box edited by hand.
Each entry would need this info:
Title
Description
Date added
Days to fix (or something, when this has run out, a PM is sent)
Priority
Public (I really want this, to allow normal users to view parts of the list)
U_Number (Who added it to the list)
Assigned (User number of person who has been assigned this task)
Approved (When someone other than an admin adds an item, it won't be approved and won't be shown until it is.)
Configurable options:
Who can view (everything on) the list: Choose groups
Who can add to the list: Choose groups
Moderate new items? Yes/No
Default sorting: Priority/Date added/Assigned/Days to fix/Title
Should it be possible to enter all values for public posters, or only title/description?
Possibly it should be possible to add comments to the items, people might have some insight on the items, or want to know more.
Don't know how comments should be added though, since we have the best discussion software there is, it should be used. =] So maybe each item which gets comments will get a thread in a closed board and all the replies to that thread is listed on the item.
