Anybody listening or watching the mass media knows that the media Twitter handle - at San Francisco's KCBS, it's @KCBSnews - are replacing 800 #s and SMS as the preferred form of corporate contact. The reasons are obvious:
Now, Pepsi in the UK under its Pepsi Raw brand name has imprinted its Twitter handle on the can (via @Mashable). It's a simple and logical step for corporate PR departments, and pretty obvious that Twitter will become ubiquitous for corporate branding and communication.