StumbleUpon is a very popular social media sharing and aggregation site with over 20 million users. They recently launched an immense user-end overhaul that changed pretty much everything about their site. [youtube=http://www.youtube.com/watch?feature=player_embedded&v=F8DtI9e4xZ8] Though they have just recently removed themes, groups, and blogs from their site, the new changes seem focused on directing users away from […]