I have set-up a new page on the Tcl'ers Wiki to list the changes I have made to Wikit (the Tcl'ers Wiki engine) and my roadmap:
It's a "personal page" such as this one but as it's on a wiki, everybody, ...... I mean you can edit it! So go ahead! Express your ideas about wikit, Java, or Tcl! I'll answer the comments.
Update: it has been relocated to http://wiki.tcl.tk/Ideas%20for%20Wikit%20enhancements