Hello,
First of all I have no experience with d3.js ... but I can learn quickly!
why ? - because I've worked with javascript (maybe I'm not a guru but I know enough), I have worked for 2 years as an as3/as2 developer for AeL at Siveco Romania(one of our national it firms) - I know good enough to work with jquerry and other few js framework and currently I study java language (this has nothing to do with all this, but just tell that my programming knowledge are not basic one :) )
so ..if all this is fine with you, I will request 1 week of study and after you can submit me a real test regarding the d3.js development and if you are satisfied we can continue
Best Regards,
Florian