According to Ian Sherr, "Apple, Microsoft Hire Linguists to Duel Over App Store Name", WSJ 3/30/2011:
Microsoft Corp. (MSFT) and Apple Inc. (AAPL) have both hired linguists to serve as experts in the tech titan's ongoing battle over whether or not the government can grant a trademark for the term "app store."
Microsoft's expert is Ron Butters, who is quoted as writing that "The compound noun app store means simply 'store at which apps are offered for sale,' which is merely a definition of the thing itself — a generic characterization".
Apple's linguist is Robert Leonard, who "who asserted that the electronics giant's 'App Store' was a proper noun and deserved to be trademarked, even though the words are generic when separated".
There's some useful (though partisan) discussion of the history here, and the filings in the case appear to be indexed here, where you can find Robert Leonard's declaration and Ron Butters' rebuttal. In addition, Microsoft has filed a sort of post-mortem of "app store" hits in Lexis/Nexis, by Nathaniel Durrance, here.
Curiously, Profs. Butters and Leonard are also engaged on opposite sides of a current criminal case. According to Beth Hundsdorfer, "Expert ties threats, graffiti to Coleman", St. Louis News-Democrat, 3/19/2011:
A forensic linguist testified Friday that emailed threats, threatening letters and spray-painted graffiti at the murder scene were "consistent" with documents written by murder suspect Christopher Coleman.
Circuit Judge Milton Wharton will decide whether Robert Leonard, a forensic linguist at Hofstra University in New York, will testify at Coleman's upcoming murder trial.
Leonard testified that people have certain patterns in their written words that allow a forensic linguist to determine whether documents may have the same author. […]
The defense announced their intention to call an opposing expert Ron Butters, a former professor at Duke University and forensic linguist, but O'Gara stated he was not available to testify at Friday's hearing.
Wharton reserved ruling on whether the forensic linguists' testimony will be heard at trial, but scheduled the final pre-trial hearing in the case for April 4.
I believe that it's time for Shaenon K. Garrity to resume her Narbonic strip, which went into hiatus at the end of 2006. Or perhaps she could give Antonio Smith, Forensic Linguist, his own spin-off series. Though this time, perhaps, a little less emphasis on correcting real or imagined usage errors, and a bit more on (say) defeating legions of Zombie Rules.