Wow, impressive CV - great job!
I'm with what the previous poster said: You won't get into Harvard without an application.
However, I do also have to say that it's good that you seem rather modest and down-to-earth. My CV looks similar to yours (3.76 GPA, 4 years lab experience but no conferences/lectures - as for the papers, I'm not sure how much they count unless they're through peer-review), I'm also in Developmental, and I applied to 10 schools this year... and didn't get into one.
So while I strongly believe that you have a shot at Harvard and "all the great names" (though make sure that they even do what you want... I canceled my Yale app because there was nobody doing my line of research, prejudice and normative behavior in infants), I find it very important to have an actual safety school. Mine was ranked 30 and I truly believed that I would be in without any trouble - and they were the first to reject me, back in January.
Good luck!
Jana