ryano has it right. You crazy Americans have twisted the use of the word
LEGO, assuming that it works in a plural form. Not so.
See LEGO's fair use page, http://www.lego.com/info/fair.asp, which describes how the LEGO trademark may be used...
If the LEGO trademark is used at all, it should always be used as an adjective, not as
a noun. For example, say "MODELS BUILT OF LEGO BRICKS". Never say "MODELS
BUILT OF LEGOs".
Ahha! Further evidence is to be found in the rec.toys.lego
FAQ
ftp://rtfm.mit.edu/pub/usenet-by-hierarchy/rec/toys/lego/LEGO_frequently_asked_questions_%28FAQ%29
One catalogue, dated 1980, has the following on its back page:
Dear Parents and Children
The word LEGO(R) 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
So, there you go. The definitive answer to the
LEGO /
Legos debate.