#14, #12, #15, #13 - I like your logo offerings. Can I see these with CSTA rather than CSEC? CSTA is our company acronym and many people identify our conference as the "CSTA Conference" rather than its official name. I think it would help people to see the CSTA in the large letters, and the full name of the conference.
I like the rounded edges, the way the lines move into the 2012. I would like to see the name of California Science Education Conference a bit larger in font size.
Can I see #30 without the color background? I do like #33 and #34 - they are just a bit too busy. I do like the puzzle concept. I don't need to see it in another form, I just wanted you to know I liked your concept.
I actually still torn on if I like #30 or #32 better. #30 is less busy - which is good - but #32 squeezes our whole company name in, which I like. Maybe we can add elements from #31.
How about this: Put CSTA and the company name in the black part at the bottom of the logo (as in #31) but with the styling that is in #32 (with the initials in the squares), and then in the space next to the microscope have "California Science Education Conference" like in number #31 - but without the "CSEC" part.