Here are all the things I've found useful or inspirational...
FWIS - Readymech
Whilst riding around blogcatalog I came across a blog that I didn't understand but really liked the look of. It was dezacrobat. And whilst rooting around there I thought it only fitting that I should lift a link from it. I'm loving the cubic creations on Readymech - very inspiring! The image on this post is of one of the many paper models you can print out, cut up, fold and stick together. Smashing.