I have the tenba discovery photo laptop messenger and absolutely love it. The camera sections lifts out completely for when you want to pack for a couple of nights and want to take your laptop but no camera (business trip etc). Completely packed it held my 13"MBA, charger, d7000 (without the vertical grip) with a rokinon 35mm/1.4 (big ass lens), nikkor 50mm/1.8, sigma 30mm/forget f stop, a couple of notebooks, assortment of pens, pencils, wallet, phone, jh16. Oddly enough it wasn't bad at all to walk around with.
http://www.tenba.com/collections/discovery.aspx