Earlier today GCG reported receiving a request to turn over a domain name that contained the word microgaming in the domain name in the thread Microgaming seize "microgaming" domain names. We've had other similar threads covering similar situations with respect to other brands and other GPWA webmasters over time.
The whole area of domain names containing trademarks or brand names of third parties is a complicated one. Certainly it is fine if you have been granted permission by the trademark holder. And sometimes it can be acceptable even without permission. A common example is domain names of sites that document criticisms the the brand in question with a domain name of {brandname}sucks.com.
Certainly from an SEO perspective it is a winner to have a domain that includes a brand name associated with a site you are promoting as an affiliate. But brand owners frequently take a dim view of such practices, and that can lead to conflicts between brand owners and affiliates.
What practice do you follow? Do you ever register domain names that include brand names? If you do, have you ever been challenged regarding that practice? Have you ever stopped using a domain name because of such a challenge or turned a domain over to the brand name owner?
Michael