Unfortunately, today isn't the best day since Google is actually running a special logo today celebrating the cartoonist E.C. Sagar, the man behind Popeye the Sailor. However, if you install and choose a logo today, you'll see it on the search results page, and likely tomorrow (depending on whether or not there is a special logo running then too). I've set might to be this fancy scientific logo for now. I found some other of my favorites too:
I will admit that I'm undeniably biased as a friend of mine actually wrote this extension. If you like it, don't forget to rate it too.