Can Dell Trademark "Cloud Computing"?

This PC World article reports that Dell has applied to the U.S. Patent and Trademark Office to trademark the term "Cloud Computing." Uh, I'm no expert on trademarks but can they do that? Any why are the other big cloud computing vendors not up in arms over this? Can any one company own a name so general as "Cloud Computing?" Back in 2006 the company I work for and their business partner attempted to trademark "Web 2.0" in association with the Web 2.0 Summit conference and met with a huge backlash from the community. Will we see a similar response on Cloud Computing? According to the document on file with the US Patent and Trademark office, the status on this request is report as "Opposition period completed, a Notice of Allowance has been issued".