Honestly, I don't know how they got away with OOo. Was there some agreement with the Open Office trademark owner (who might be more amenable, being an ubuntu affiliate and all)?

Maemo.org is clearly about the Nokia product called Maemo, and Nokia believe they have a right to it ("“trademarks” means not just Maemo logos, but also the names of its different writing variations, as well as the name maemo.org and names of maemo.org services").

Even if they turn out to be wrong, who has the time/money/energy to fight this in the courts?