Smartcoin,
I only just found out about this. Any chance of extending the poll?
I've only seen two logos. The original and the leaked prototype logo someone posted a page or two back. Not really a fan of either. The original is particularly difficult to see when in a list or minimized. It looks like a blank white circle. Check out coinwarz.com for an example of what I'm talking about. And that new design doesn't fare much better.
I'm all for community participation. And it's good to get feedback from the Smartcoin community. But, ideally, you want to go with either your own gut or, if you know you're not design-minded, the informed opinion of someone who knows design and understands the design functions of a coin logo. I'm not really that guy though I do like to think I know good design when I see it. But there may be someone like that among us.
If I had a vote, I would be voting for something very simple and striking that's going to stand out on an ever-growing list of currencies. Maybe there's a candidate on that poll. I just hope that it's a significant departure from what I've seen so far.