The trailer for the Ricky Gervais written and directed comedy The Invention of Lying (orginaly titled The Other Side of the Truth)look to be promising.  With a great cast (that includes Tina Fey, Rob Lowe, Jonah Hill, Christopher Guest, Jason Bateman, and Jenifer Garner) this film looks conventional enough to attract a mainstream audience while still keeping that trademark Gervais humor.  The film takes place in a world where no one has ever told a lie, until of course a writer (Gervais) takes full advantage of this world for personal gain.  It opens wide on September 25th.