 Are there any meta question answering sites on the web?
Mz: As a guess:  Not likely to work.  Different forums are different little cultures.  Data-mining a culture tends to be viewed as a hostile act by the members.  "One post wonders" and similar tend to be viewed with suspicion.  Even if you could get past that, such queries sent to multiple forums would practically be guaranteed to violate cultural expectations of one or more of the forums to which it was forwarded.  The only way this would work would be if you had a staff who made it their business to belong to a bunch of different forums, be in good standing in those forums, and know how to rephrase any questions sent them so it meets cultural expectations of the various forums.  This is already done informally when someone like me says "Hey, if you want, I can ask around and let you know what I find out, if anything."