Bitcoin is a trademark held by MtGox, on the dubious theory that "better they than someone else". There was some talk about them transferring this to the Foundation, but nothing came of it AFAIK.
So if the foundation still hasn't done anything about this, then shame on them. Bitcoin is then an asset in the bankrupt holdings of MtGox currently controlled by the courts of Japan.
"Bitcoin" is no longer protected and is within the public domain both in law and fact. Specifically, the word is not seen as a viable asset worth protecting by any specific government or court trustee within the scope of the current proceedings as that is not their focus. Likewise, I doubt anyone would be successful in the long term claiming ownership or exclusive use via a trade and/or service mark.
Scott-