lorax - 2:20 am on Nov 20, 2010 (gmt 0)
I have to wonder if a person with thousands of followers would be willing to risk their online social clout for a product. I also wonder what level of effectiveness it would have. I tend to ignore most (not all) of those people because it's pretty clear to me they are busy gathering followers to impress someone. The few that I do pay attention to are unlikely to become a spokesperson for you - they have a solid online reputation and aren't going to tarnish it.