There was a "visual kei dictionary" site, although it seems to be dead now. Luckily you can still access an archived older version of it which still has plenty of content over at
https://web.archive.org/web/20090224181743/http://visujisho.chikasen.net/
Not completely related, but they also have a nice guide for going to VK lives in japan https://web.archive.org/web/20080613183900/http://www.rushedblue.com/live101.html