Wiki Applications within Libraries

I really like the idea of using a wiki for the library policy and procedures manual. It should be available on the staff intranet site for all staff to access, edit and add to. If this were to occur I feel that it would be updated more regularly and would therefore be a more useful tool to train staff as the policies and procedures included would be current. Its ease of access would also encourage more uniformity between different staff members and branches as the same version of the policy and procedures manual would be accessible to all.