Astroturfing is the name given to running a public relations campaign which is meant to look like spontaneous behaviour, particularly on blogs, but isn't. Motorola have recently been caught out doing this by leading blog site Boing Boing. Here are a couple of examples:

 'I’m so glad my boss isn’t like that! I’m working with Motorola right now, and became a huge fan of the Krave (motorola.com/krave). I especially like the full touch screen display and html web browser. It’s awesome!'

 and more of the same:

'Oh man this looks awesome! I hope they release a version for the Krave by Motorola. Ever since I started working with Motorola I have became a huge fan of the phone (motorola.com/krave). With a full list of features, like a full touch screen, I can’t stop obsessing over it.'

Not exactly subtle and now they have been found out; in fact a Google search for 'ever since I started working for Motorola....' turns up more than a thousand results.