I was thinking the same but thought there may be an "open door" to get good content. A few days ago someone mentioned a new q&a script (paid) which features the option to import questions and answers from yahoo answers. I am still not sure if this is legal, but for sure it will be included somewhere in their TOS . But as I am not an authentic english speaker, the used terms for me are to difficult to understand exactly.
However, if it would be legal this kind of content importer would be great for q2a as well.
As well I was thinking to buy it, import the content, export the database and reimport it to q2a, and sell the license again...kind of crazy, I know ; )