Reply #3: NetworkSolutions is offering "protection" for trademarked names for about $650 for 5 years [View All]

[slackmaster]

You have to provide proof of your trademark, and agree not to deploy a .xxx Web site using that name during the 5-year period.

I checked and found that ibm.xxx, microsoft.xxx, and apple.xxx are listed as "available." I rather doubt that the big players would bother paying protection money. They'd just sue the pants off someone who violated their trademarks.