I know you guys discussed the idea here a while ago, but I can't find it's thread anymore and the result was a bit unclear. So I started one on the Wikia platform which is very nice and has a lot of features the real wiki has. At the moment it is still very empty and obviously I can not fill it in alone. I threw in a bunch of things and simple tutorials to get the thing started, but this will only work with more people. It is open for everyone to create and edit new pages, upload pictures and insert videos. The final structure and layout has not really been decided yet, so if you create contents they might be moved to other sections or merged together with other sites at some point. There are some wikis on the platform which I find very resourceful myself and I hope that this might get one of them!
I hope some of you will do a visit and write in some stuff: http://railworks.wikia.com/wiki/Railworks_Wiki