In searching for a better version of the London 2012 logo to use in my last post, I came across some real gems in Google Images.
I think we all looked at the original logo and thought "hell, I could do better than that". These people set out to prove it:
Very, very nice - I like the top one best, but the bottom one is also excellent. The middle one's a bit meh, but it's still better than the official logo.
This person went in another direction: