I liked it until I read the text at the bottom. Just feels like an overly used phrase that you just slapped on there, and it has nothing to do with your image itself (which is awesome and I enjoy it on it's own.)
I like the slogan, though I would either subdue it or... better, have a 2-in-1 shirt sorta and make that "Be nice to geeks..." slogan be around the BACK of the shirt's COLLAR... rounded as it is, but not detracting from the image. The solid zero lettering works very well... interesting that "anyone could do this" but almost no one has... one of those rare winning shirts that doesn't take immense coordination artistically, just precision and a bright idea. Well done. (I mean that as a compliment that goes higher than something merely being really beautiful--it's a totally different and not-often-found kind of winner, the intellectual, precise one).
About my design