I like it, somewhat. I find the colours pleasing to the eye, inviting, and friendly. However, the ['} seems a little too dotcom for me - like the logos of the long forgotten websites of the dotcom boom and bust era.
Out of the options available for voting, it is undoubtedly the best option, but I think there could be better. However, I'm no graphic designer or marketing guru, so I doubt I could improve on it much. Unlike Stack Overflow and Server Fault, I find it hard to conceptualize the name to an image for Super User - all that springs to mind is a needle and I think that's the wrong message.
I should add that I wasn't around to take part in the vote and therefore, probably am not worthy to comment, but the logo with a cursor inside a star seems a better image to go next to the current text.
Of course, it's important to give due reverence to the declarations made when the vote was announced where Jeff stated:
I do not put a lot of stock in crowdsourcing design feedback (the poll winner may not “win”), but it will factor some in our final decision.
So, I doubt this thread matters much other than as a place to vent at our inability to effect a change.