The contest is now finished.

Big thank you to all who contributed their designs.

The winner will be announced later, as I am having a hard time picking between these finalists:
http://i.imgur.com/oY5Ls8l.png

http://i.imgur.com/Zz8IyIi.png

Feel free to share your thoughts on the best logo.

I'd like to say a special thank you to logocreator who made so many designs. Some are very cool.

Since all the finalist logos are created by two different users, both of them are receiving 0.05 BTC (i.e. the runner up receives 0.05 BTC, which was not announced previously). The winner [deadline for announcement: 12 May] will get additional 0.10 BTC and this will conclude the contest.

Thank you again!