Phoronix Test Suite wants a logo - if you are up to the task head on over and help them out.
I am not a huge fan of logo design contests in Free Software. They are generally painful and end up with strange end points. At any rate, this is another case of "I-couldn't-help-myself-itus."
If you aren't from North America, you may not be familiar with the oil performance additive STP. Without that connection, this is just a drab dry boring logo.