+1 on transferring the existing wiki &c as is. It would make little sense to delete years of contributions. IMO it passes the message that user contributions are merely tolerated, rather than welcomed and appreciated. The latter being central to open-source software, it would have a cooling effect to take the former path. Along the same tack, deleting users who have not contributed to the wiki for a few years would also have a chilling effect. Deleting users who never contributed or whose contributions would be considered spam by any hundred reasonable people is a different situation.
Wolf
