Facebook asserts trademark on word "book" in new user agreement

jbrodkin writes: "Facebook is trying to expand its trademark rights over the word "book" by adding the claim to a newly revised version of its "Statement of Rights and Responsibilities," the agreement all users implicitly consent to by using or accessing Facebook. The company has registered trademarks over its name and many variations of it, but not on the word "book". By inserting the trademark claim into the Facebook user agreement, the company hopes to bolster its standing in lawsuits against sites that incorporate the word "book"."