I just found this on
http://en.wikipedia.org/wiki/Legos, trying to figure out if it really called Legos in the US :
The Lego Group's name has become so synonymous with its flagship toy that many use the words "Lego" (collectively) or "Legos" to refer to the bricks themselves, and even to any plastic bricks resembling Lego bricks, although the Lego Group discourages this as dilution of their trademark. Lego catalogues in the 1970s and 1980s contained a note that read:
The word LEGO® is a brand name and is very special to all of us in the LEGO Group Companies. We would sincerely like your help in keeping it special. Please always refer to our bricks as 'LEGO Bricks or Toys' and not 'LEGOS.' By doing so, you will be helping to protect and preserve a brand of which we are very proud and that stands for quality the world over. Thank you! Susan Williams, Consumer Services.
...........................You've all been warned.