Hello! I have created a new wiki called Tram and Trolleybus Wiki. It is a brand new project. Everybody is welcomed to contribute in Tram and Trolleybus Wiki http://tramtrolleybus.wikia.com/wiki/Tram_and_Trolleybus_Wiki
I find Worldwide Trams Wiki great! I found this wiki some days after I created Tram and Trolleybus wiki, it is the reason for two similar wikis.