I found this post on the Official Google Blog pretty amusing. The perils of a major successful company, shed a tear why don’€™t you?
The post does however remind you that your trademark is yours to protect. Digg has done this in the past, and by doing it they pissed off a lot of people. How you handle your trademark is a very delicate topic for lots of companies today, especially in the Web 2.0 field since there are so many business models that build upon a friendly user base.