Harry Fuecks talks, in this new post on the SitePoint PHP Blog, about some of the advancements being made with the Zend Framework and the QEDWiki setup.
The idea of application wikis and situational applications has a lot of potential IMO. If you consider Dokuwiki (tends to get mentioned round here) for example, its interesting that a number of users have employed it as an alternative to a CMS—it gives you more structure than most wiki's thanks to things like namespaces but is far more flexible than your average CMS.
Harry also mentions some of the plugins included (behavior syntax and Ajax chat) and recommends developers keep an eye on these new introductions by IBM to the world of PHP.