I'm creating login mechanisms that include login through Facebook, Twitter and Google/Google+.
Now all i need is artwork and graphics from these 3 different companies. I know i could have just googled myself a couple of "unofficial" images. But i thought i`d do it the proper way and go though official channels to obtain artwork and graphics that are licensed to be used by other websites.
Does anyone know where one can get a hold of the licensing details and artwork in question?