Tim responds elegantly and cogently to the Web 2.0 trademark controversy. However he compares the use of Web 2.0 with trademarks for Apache and Linux.
Spot the difference Tim, I can run an Apache conference or a Linux conference safe in the knowledge that neither organisation will come gunning for me. They distinguish their conference marks (Apachecon, LinuxWorld) from their web memes (Apache, Linux) , and rightly so.