#15 is a really nice, flowing image that everyone here likes. It would be nice to see it with a different font for "Yokayo". Perhaps a little less bold. The font for "Biofuels" is great.
In the brief for this contest, you can find the web address for our motto (it utilizes a symbol, so I couldn't just type it). I would be curious to see how you can work the motto into this.
Thank you.
p.s. - it just occurred to me that it is pretty reminiscent of the Piedmont Biofuels logo:
http://www.biofuels.coop/ - they are friends of ours, and would probably be flattered, but it is something to consider.