As I told I had a strange idea... the idea of using a walnut.

Why a walnut? 
Well inside you find two pieces that look like brains.
Two brains put together in a shell -> thinktank, collaboration, thinking/working together towards a nice result, ...

In Web2.0 you often find these strange reflections to come up with a logo (cfr delicious, twitter, ...) or logo's with the emphasis on the name rather than on the picture with it.

I told you guys in advance it was a wacko idea, you either like it or hate it.  I didn't have the time to really experiment with fonts and stuff, so just be honest...