I read this blog post on the Google office blog about their new favicon. I really like to know how many companies give such thought towards the favicon. Usually its the graphic designer going this looks cool etc.
These guys made nearly 300 favicons and are still testing it. I am okay with the new one it looks fine.
From the list I like the magnifying glass one and the capital G also look good too. Will be interesting to see what they will settle for finally.