New Logo Concepts - Crit please?

OK so my friend and I are re-branding our collaboration blog. So we came up with our new name: “The People’s Lab”, and now we need a logo, (this is were I step in) and I created some concepts. Please let me know which one you like the best, and what changes could be made to them. Thanks.

Oh and here they are: (that dark blue is going to be the background for the logo)