Any numbers on the percentage of users who are professionals? Considering the college roots, my guess is it isn't too high. I'd like to see trends on growth in the UK as well, across demographics.
Another note: banning a site in hopes that your employees will be more productive is a waste of time (pun intended). Wasting time on social networks while at work is a symptom of a bigger problem.
"Another note: banning a site in hopes that your employees will be more productive is a waste of time (pun intended). Wasting time on social networks while at work is a symptom of a bigger problem."
I disagree. People are obviously addicted to these social sites and if you make it impossible for them to get another "hit", they will wean off it in a day or two. I wouldn't call this a 'bigger problem', everyone has some weaknesses.
Another note: banning a site in hopes that your employees will be more productive is a waste of time (pun intended). Wasting time on social networks while at work is a symptom of a bigger problem.