When I attended OneBigLibrary Unconference last summer, Trevor Owens gave a talk (un-talk?) on this version of Zotero and some of the new features and ideas that would be part of it (my post about it is here). It has come to fruition, and it can change the way you do research (especially group research). See the video for a great overview.
In addition, Peter Murray (a.k.a. the Disruptive Library Technology Jester) has already set up a way to distribute your own Zotero citations via an RSS feed. It is a great sign of success for a project like Zotero when people are creating mashups when your product is just a few days old. Think of the ways that this could be used to promote library services, especially if your library software doesn’t do RSS.