Another interesting hit is this question and response in Google Answers. 

http://answers.google.com/answers/threadview?id=271995

The question was what were the benefits–in the lifestyle and job market–of being bilingual.  The responder is a very well-informed–to my knowledge anonymous–person who has posted a wealth of interesting links about everything from the statistics of employment and poverty levels of bilinguals to IQs and creativity.