I am just wondering if I've got a mate from SimHQ by chance.

It is his nice add on(?) that got my attention...

From CNE 2009 Canadian Int'l Airshow

Apparently it's a BushHawk shoulder mount. Looks pretty nifty.

http://www.outdoorphotographer.com/columns/solutions/solutions-bushhawk-shoulder-mount.html
http://www.michaelfurtman.com/bushhawk_review.htm

A quick look suggests that it's around the $300USD mark though.

I have seen one at an airshow before, it's a very nice piece of equipment. I think it's overkill for aviation, but it's amazing for wildlife.

Call me a perv..but I swore this thread was going to have boobs in it for some reason..

Chris, your a perv! ;-)
I thought about getting one, between the Bigma and my lack of keeping my hands steady I thought this could be useful. I saw one used at Oceana when I went and thought it could be useful but the pricetag for the amount o shows I get stopped my purchase.

for the wildlife and bird photos i take it looks like it could help me, might look into it more when i get back to work in jan.

if your shooting with a 500 4 or 2.8 i can see it could be usefull, but to have a 70-200 f4 mounted, looks quite ghey..

Doesnt he have an extender on it too?

still looks a little small for the use of that, I would something more like this which is on that second link
http://www.michaelfurtman.com/images/furtman_bushhawk3w.jpg

I believe he has a Canon 70-200 f/2.8 with a 1.4 Canon Lens Extender. I have this rig with a Canon 50D and it takes great photo's!

Errrrr Beach, sorry no boob shots with it yet..... but I'm trying!