This is one of those small but very welcome additions to the new Photoshop CS. For me, I do not care one bit about the embedded color profile of an image. I mainly use Photoshop for web development. You can now check the box that says "Don't show again" (also available in the Preferences.
I cannot tell you how many times I have clicked the "Ignore" button in Photoshop 7, and wished there was an option to turn this off. Well I guess I was not the only person annoyed by this.
Thank you Adobe, for adding this feature (its about time).