Today is Father's day in Germany and Google Germany has a special logo up for the day. The logo looks nothing like the 2009 Google Father's Day logo from last year. In Germany, Father's Day is Vatertag. Here is a picture:
Forum discussion on the Father's Day logo at Google Blogoscoped Forums.
A Google Web Search Help thread points out an old but cute Google Doodle that is triggered when you conduct a search for [< ahref="http://www.google.com/search?q=ascii+art">ascii art] in Google. It basically shows an ASCII Art version of the Google logo. Here is a picture:
Forum discussion at Google Web Search Help.