Trademark issues with "Facebook"

Aaron Greenspan is thinking about opposing some published facebook trademark applications.

PCWorld noted:

Facebook already has bullied around a few companies over its names. Take for example PlaceBook. The travel site was forced to change its name to TripTrace after a legal threat from Facebook. TeachBook is also under fire, but that company is vowing to fight Facebook’s legal challenge in court.

Also, TechCrunch:

It is not just the word “book” at the end of a company or product name that Facebook might object to. If it has its way, the word “Face” at the beginning of a name might also bring out its lawyers. In fact, Facebook is currently trying to register the word “Face” as a trademark. (It already owns the trademark on “Facebook”). Facebook took over the trademark application for “Face” from a company in the UK called CIS Internet Limited, which operated a site called Faceparty.com. Presumably, Facebook bought the application sometime around November, 2008, which is when its lawyer started dealing with the USPTO.