Think Tank Photo has announced the Speed Convertible Series - featuring revisions to the Speed Demon V2.0, Speed Freak V2.0, and Speed Racer V2.0 shoulder bags.
Here are links to full descriptions of each bag:
Speed Demon: http://www.thinktankphoto.com/products/speed-demon-v2.aspx
Speed Freak: http://www.thinktankphoto.com/products/speed-freak-v2.aspx
Speed Racer: http://www.thinktankphoto.com/products/speed-racer-v2.aspx