This page outlines the currently planned changes for Flourish. Right now the project is in beta, with the development focus being on stabilizing the API. Most of the remaining work before it becomes stable is related to:
The current issues include many of the remaining items, but not all tickets will be completed by the time the project becomes stable. At the current pace I expect the stable release to happen by late 2012.
Please note that Flourish has undergone a good deal of real-world testing, and can generally be considered production ready.