Canon apparently has some loaners of the upcoming EF 200-400mm f/4L IS USM lens on hand at the Olympics.  The development of this lens was announced alongside the official unveiling of the new EF 500mm F/4L IS II USM and EF 600mm F/4L IS II USM lenses - both of which are now starting to trickle into commercial availability.

As I was reading Jeff Cable's update from London today, I noticed that he dropped by the Canon loan desk to borrow one of these new lenses.

I contacted Jeff to see what his thoughts are on the lens; however, I know he's busy over there and it may be a few days before I hear back.  In the mean time, you can follow Jeff's action in London over on his blog.

Hopefully, this is a good sign for the availability of this lens and Canon will begin shipping it out to the mass market sooner rather than later.

Stay tuned.