Guest post by Andrew Blakeley. Follow him on Twitter (for exclusive deals and offers!) I recently undertook a simple Facebook experiment, inspired by a brief Monday morning rant from my boss: “This morning my yoghurt told me to find it on Facebook. It didn’t tell me why, it just told me to find it. Why on Earth would I want to find a yoghurt on Facebook? It’s a yoghurt!” He was right, of course. As social networks slowly become the…