XSSer is currently in version 1.6b (01/12/2011), called "Grey Swarm"
The next step in the Roadmap is to stabilize the tool (bugfixing), to improve accuracy of the injections and to grow on the community.
Actually, XSSer allows WebSockets technology that are necessary to be researched in order to connect all the tools in a single direction. The name of this feature is "swarm", and needs to be tested as well as having new developments.
It is also necessary to investigate new XSS vectors.
Also, to implement a messaging system and enhance the functionality of connection between XSSer participants.
Finally, it is necessary to give more visibility to the tool