Robert Scoble raises an interesting point regarding trademark violation in virtual games. Apparently some user-created content in an MMORPG called “Second Life” uses logos such as the “Apple Macintosh” which is currently trademarked. While no lawsuits have occured, it may be only a matter of time until suits are filed.
In fact, this is somewhat similar to the case between Cryptic Software, the creators of another popular MMORPG called “City of Heroes” and Marvel Comics. Stephan Kinsella analyzed that case (which was eventually settled outside of court) and rightly noted its absurdity in terms of any property rights violation.
Note: meat-space companies are opening up virtual shops in Second Life, so these lawsuits will probably happen sooner rather than later.