O'Rielly gaffed on this one. He's suing a small Web 2.0 community member. Trademark is a first use issue. Tim didn't coin the term Web 2.0 I believe a more accurate description is that he popularized it. Great point by Paul K and others.
If it is true then Tim is very short sighted and needs to address it. I agree Web20World would be ok with me but not Web 2.0. Hell I have a podcast channel on iTunes titled Web 2.0. Will he try to sue me. In a court it will be found that Web 2.0 was used before he used it so the case doesn't look good. Plus the word is too generic to be service or trade marked. IMO
Anyway isn't O'Rielly Irish?