Bilingualism blog Multilingual Living provides an interesting piece by François Grosjean, who has considerable experience in the speech sciences. His publication record boasts research in both production and perception, but this piece, which clarifies some misconceptions that people have about what it means to be bilingual, is written for a popular audience.
While you’re there, you should check out the rest of the blog for more information about multilingualism. You can also find them (and LingEducator!) on facebook.