kaled - 2:43 pm on Nov 15, 2010 (gmt 0)
Provided you are not acting deceptively or profiting from someone else's intellectual property (i.e. the trademark) you may be ok.
The internet has blurred many international boundaries and the law is a long way from catching up. If your blog is targetting an audience outside the USA, and your domain name registrar is also outside the USA then I would only expect a problem to arise if the trademark belongs to a multinational (with deep pockets).
You should be aware however, that a trademark that isn't in use still has value. For instance, Sony has stopped making the Walkman but a few years from now, they may have a new product that they'll want to label as a Walkman so they will continue to renew the trademark and defend it in court if necessary.