Please come back in few months.
You can check for development updates at this blog.
old 2.7 sourcecode is available at sourceforge: http://sourceforge.net/projects/solar/
If you are interested in joining me on developing Solar Imperium (there is a PDF you might want to read)
you can contact me by email: ybourbeau AT mrgtech DOT com.
Ok, now back to my Vangelis and PHP :)