What do you mean for NextGenerationWiki?
The NextGenerationWiki will be a SmartWiki, which will not only serve pages, but also allow for processing of page information by the server for delivery to the user.
We're starting to see some NextGenerationWikis popping up. BackPack, a new website, seems to be the evolution of a wiki as applied to personal information management.
[The next generation wiki will be akin to Web 3.0, move to a decentralized PeerToPeer model for both security of data and protection against misuse of power, add a VotingModel so that the masses of data start to form an order, and be visualizable.]
see also WikiWithMoreThanPages WikiWithMoreThanUsers, WikiVersionTwo.