It's just a dock icon for the new PS CS3. I looked for an icon for my dock, and in fact I preferred to make it alone, I hope that it will help you.
2 version in 256 x 256
+ 1 version in 512 with shadow
Go on the site of ADOBE to see all the novelties of this new version of Photoshop, you will see it is incredible!
There is also a Photoshop CS3 extended version which allows to work with 3D.
I give you the link towards the ultimate pack of Adobe :
Master collection : [link]