I like the 1's and 0's, and you've made an interesting colour choice. I'm not convinced that the logo will work well at smaller sizes, so perhaps you could try a simpler take on the same concept. And it's not clear to me what the two ovals are in the top-left of example: #44?
Prefer example: #67, I don't think the ones with the geek looking on work as well (although I underdstand what those two ovals are now). And I'm still not sure that the 0's and 1's will be visible at smaller sizes. Remember that we want to use this in the navigation area of our website.