Wiki fever

I am amazed at the effficiencies that a wiki provides. Why haven't we at a local level been making more use of them? In our library network a wiki would be a great tool for maximising input across the network. A great tool also for the meeting phobic in our midst! A wiki that staff could nominate availability for events would save heaps of time.
A wiki targetted at Readers Advisory would be beneficial with contributions from staff, book club members and the general public. A wiki could also be used to replace the traditional comments/feedback book.