You'd think that Yahoo would be able to find some engineers that weren't guilty of revealing trade secrets from their previous places of employment. However, this News.com story tells a different story: "Yahoo accused of poaching speech engineers" (http://www.techrepublic.com/2100-10878_11-5885971.html).
Speech technology company Nuance Communications filed a lawsuit that accuses Yahoo of trying to steal trade secrets. "In court documents, Nuance alleges that Yahoo 'gutted' its research and development unit and hired away 13 of its engineers. Nuance also alleges that its former vice president of research and development, Larry Heck, helped Yahoo hire a dozen of his engineering staff."
If Yahoo still needs help with speech engineering, READ MY LIPS: hiring eligible engineers is a much better way to spend your money than throwing it away in court costs!!!