This became quite major news earlier in the week when the New York Times used the data to identify a 62 year old woman in the US and turned up on her doorstep with all sorts of personal information! Quite scary but have a look at some of the news sites and you’ll see why 
the interesting thing about the data is that it contains 5 columns, the latter two of which relate the keywords to the sites. It’s probably valuable information to a lot of people if you can be bothered to trawl through it. Also, wherethe SERPS results that were clicked appeared on the results page which could be interesting.
That said, the results are likely to be skewed in that AOL’s demographic is unlikley to include corporate users or those with technical knoweldege of the Internet.