Finally I've chosen a WiKi platform to handle Roma community and documentation: XWiki.com. The software is entirely written in Java and they offer free hosting at acceptable speed (From italy it's quite speed...). What's leave a bad in the mouth is the page layout that cannot be modified, but only at CSS level...
So bear in mind this URL: http://RomaFramework.xwiki.com
Instead I've chosen SourceForge to host the entire SCM of Roma. The main reason is for robustness and quality of service and because now SourceForge supports SVN! ;-)
Starting from today all Roma's news will be published in Wiki Blog at: http://RomaFramework.xwiki.com/xwiki/bin/view/Blog/WebHome