Thought this was an interesting article: Charlie Sheen on Twitter.
Apparently Twitter is quite a money maker for celebrities. Kim Kardashian gets $25,000 per Tweet. One of her recent tweets for Armani (which netted her $25k) drove 40,000 hits to their website in 24 hours. While it does drive hits to the website, the article mentions that they have no data on how much product was actually sold. In addition I would assume that as companies branch into this it will become more difficult to keep a handle on brand image. The article gives a good example of 50 Cent tweeting about a penny stock. Imagine a celebrity Tweets about your product, then goes out drunk driving and ends up killing someone…
So again were back to the value question. How much value is there in PR and marketing in social media?