Every day, Google is show casing a different Google Doodle (logo) on their home page for the olympics. We've been archiving the logos in this post, so if you want to catch up on them you can.
Today there is a more robust Google logo up for the hurdles even. It is an interactive logo that you can race your friends and share the results on Google+. Here is a video of my poor performance:
Here is a static image of the logo:

Yesterday there were some complaints that Google didn't have a special logo for the landing of the Curiosity rover on Mars. Truth is, Google did incorporate that in their logo yesterday, as Google Aygul points out in the Google Web Search Help thread with this picture:

Aygul from Google wrote:
Google's doodle today honored the rover by placing a drawing of it above a javelin thrower in the Olympics. The doodle originally featured just the javelin thrower with a blimp above him, but updated to include Curiosity.
Forum discussion at Google+ and Google Web Search Help.

Comments:
Leashad
08/07/2012 02:52 pm
Is it me, or is the Black guy running on a track of watermellon????
Juanita Zinkevcz
08/07/2012 03:11 pm
Yes I notice the same......so demeaning....whoever did it want the worldwide to know their hate.......sick sad person, with so much at their hand , they use hate
ruth
08/07/2012 09:20 pm
When we turn something great into just hate and racial, American is heading for destruction. America Racial DNA is alive in American. The land of the free!!!
Don
08/07/2012 09:57 pm
Who said the above poster is American? This is the worldwide web—could be from anywhere!
Come On Now!
08/07/2012 10:02 pm
Wow. Did you stop and think maybe that's supposed to be BROWN like the track they run on? Honestly, people are looking to make something out of nothing I swear.
Jin
08/10/2012 10:40 pm
but probably America.