| ICQ is actually Trademarked in Canada and owned by AOL - ie Time Warner (billion dollar company)
Cira Dispute resolution recently concluded that even a site that does not directly compete with a TM holder can be seem as a "competitor". Not for the product or service, but a "competitor" for web traffic. This precedent is dangerous, and would be used here, so even if you launched a site about "Ice Castles in Quebec"... icq.ca would be competing for traffic with ICQ.com and therefore likely to lose the domain.
Jen |