How could web 2.0 technologies be used to enhance wikis

Of special interest seem to be
a more sophisticated user model

possibility to browse based on users, not keywords/headlines
creating social networks
as an awareness tool
- recommender-systems based on user profiles
- personalized notifications
as an extrinsic motivator
- easier to achieve and to measure social status
- contributions become personal

mash-up functionality

integrates wikis more tightly into the web 2.0 world
no need to re-invent the wheel, use existing services to work with
- photos
- videos
- tags / bookmarks
- maps
enables meta-design -> the developer doesn't need to think of all necessary content-types – the users can add them through the API/interface
users don't have to add all their content multiple times to different sites -> they can access their content added once to one web 2.0 service and include it in different sites/wikis