Very very cool, hadn't heard of it before: a mashup creating wiki system for the enterprise:
QEDWiki is a lightweight mash-up maker written in PHP 5 and hosted on a LAMP, WAMP, or MAMP stack. A mash-up assembler will use QEDWiki to create a personalized, ad hoc Web application or mash-up by assembling a collection of widgets on a page, wiring them together to define the behavior of the mash-up application, and then possibly sharing the mash-up with others. Mash-up enablers provide QEDWiki with a collection of widgets that provide application domain- or information-specific functionality. These widgets are represented within QEDWiki as PHP scripts.
They also have a good demo video (although the speaker is annoying - somebody should tie his hands next time).
I hadn't had time to test it - but the demo looks amazing.