However, it's always been in the back of my mind that maybe one day they'll come along and close us all down, but I doubt that'll happen. We all have very "obvious" domains which all end in things like .com, .net, .co.uk and the like, and are all of the same trade mark (yes, it's all the same domain, just with a different tld). From the way I see it, if they'd wanted those domains, they'd have registered them before.
The precedent for this is Intel's Pentium chip. The Pentium is so named because AMD (as well as Cyrix and others) named their chips the same 80386, 80486 as Intel, and Intel could not stop them. Only by going with a textual name (Pentium)for their "80586" chip could they trademark and protect it.
Rob