Hi Omac,
I used Carrara. The little MoI was post Carrara. Thats actually a conversion of the original, which "looks" a bit better, though the animation itself is a little goofy as the beta version of Carrara 8 kept trashing my settings and forcing me to start over. I actually started it with the beta of Bryce to show, since it was mentioned here. The render was looking nice, but the same with the trashing of my scene, so I gave up and did a quick one with Carrara version 7.

If I had a bit more time, I wanted to put the MoI man jumping around from molecule to molecule! The DNA was a nice suggestion.