Just my opinions here…

I think the visuals presented are waaay too busy. Not sure who said it first but, “Brevity is the soul of wit.”

What is the purpose of DIYBio? The mission. The vision. Sum it up in one sentence; if necessary, find a poet. Now, find an artist to draw a picture of it.

People remember what is meaningful.
People are moved by what is meaningful.

I’m an MA student at the Royal College of Art in London, where we intersect design and science (I’m working with biologists at the moment), and my background is graphic design, so this really appeals to me.

A few comments/critics which are only meant as constructive, positive rants

I don’t know the exact specs, but I’m pretty sure the license agreement for the font TheMix (yes you have to buy licenses for fonts, and it’s people’s life work) doesn’t allow you to modify it, and certainly not to re-distribute it.
anyways, it’s something to check with http://www.lucasfonts.com/fonts/thesis-family/about/
personaly I think the type works best when it’s simple. the filling up with images, drop shadows, bevel effect, and the like don’t really add anything
for the icons I think you’re asking the wrong question. it’s not “what 10 icons should be designed?” and trying to solve everything you will ever need in one set, but more how to create a truly DIY visual language. a bit like Tangram (http://images.google.co.uk/images?q=tangram&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&ei=ysojS9aNGNOk4QbCpYjrCQ&sa=X&oi=image_result_group&ct=title&resnum=4&ved=0CCYQsAQwAw) for example, then whatever icons you might need in the future, as you and the science develop, is already covered by the system …

there, I hope it helps,
all the best,
David

ps: oh a tangram font in the image results! shows you you can even derive the logo from the form language)