It's here: Canon EF 16-35mm f/4L IS USM Lens

Announcing a new workhorse in my stable; the Canon EF 16-35mm f/4L IS USM!  Now i just need to take some shots to see it it's really as sharp as they say...  Preliminary in-camera shots reveal corner to corner sharpness at f4 to f9 and that extra 1mm on the wide angle end is noticeable from the 17mm I am used to.  Can't wait to take really give a good workout.