Author: Added: 10/01/2008 Duration:478 http://www.beet.tv/2008/10/stumbleupon-is.html StumbleUpon, the large referral system for discovering video and other online content, has moved to a Web-based platform, the company announced late yesterday. Previously, it had only worked with a toolbar plug-in. The new web strategy might work, posits Kara Swisher in her post. Here's the take on this by MG Siegler in VentureBeat. We've republished here a recent interview I did with co-founder Garrett Camp. -- Andy Plesser, Executive Producer