Yes, its linear.
I cant correct the Pictures on the Wiki as the only one, who can do that is offline.
There is a Dropboxlink on the wiki, which shows the most recent Recipes. http://dl.dropbox.com/u/88825306/GT_Recipes.PNG
Since that thing got kinda hidden by the friendly Guys from the Wiki, i will place it in the Thread again.
Hironimo, this is part of the reason why I made the second wiki. No one is able to add images or additional pages on the first one. That's why everything is a wall of text and all the recipes have 32px placeholders.
@Greg, Sorry, I forgot about that link. I have placed it on the "home" and "Recipe" pages of the un-official wiki.