I don't know if it was really the birthday of Googlebot, but used to see next to the crawler something like…
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
…Tonight I had a surprise.

66.249.71.203 crawl-66-249-71-203.googlebot.com
SAMSUNG-SGH-E250/1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 UP.Browser/6.2.3.3.c.1.101 (GUI) MMP/2.
It's the first time I see Googlebot on a Mobile platform. It was probably his day and received a mobile phone. :)