Almost every sig he's made (including the niemi one for me) has used multiple stocks from a "practice" psd from a sports design site.
Here's the base pic of the psd from which he rips
http://i27.tinypic.com/xpqh0.jpgAs you can see, the text/clouds/lined square are all exactly the same. He basically just changes the render.
Thanks to randolph for pointing this out to me.
Fuck off tressemme!