This maybe a little premature but I know there's some out there who've been waiting a while for this. These days in many forums i saw people keep asking "if there's some one who would like to port this to Windows 7" and now the dream comes to reality. Gaia 2009 for Windows 7 is here.
If you have no idea how to apply themes in Windows 7, look at this first:
If you don't know how to replace system files when applying a nice theme, here is an article you might need: