StumbleUpon



StumbleUpon is a commercial web discovery service that integrates peer and social networking principles with one-click blogging. The Toolbar system automates the collection, distribution and review of web content within an intuitive social framework, providing users with a browsing experience that resembles "channel-surfing" the web. Users access the service via a browser toolbar; toolbar versions exist for Firefox, Mozilla Application Suite and Internet Explorer.

StumbleUpon uses collaborative filtering (an automated process combining human opinions with machine learning of personal preference) to create virtual communities of like-minded websurfers. Rating websites updates a personal profile (a blog-style record of rated sites) and generates peer networks of websurfers linked by common interest. These social networks coordinate the distribution of web content, such that users 'stumble upon' pages explicitly recommended by friends and peers. Users rate sites by way of a simple thumbs up, thumbs down selection on the StumbleUpon toolbar, and can optionally leave additional commentary for the site's review page, which also appears on the user's blog. This social content discovery approach automates the "word-of-mouth" referral of peer-approved websites and simplifies web navigation. Stumblers (as users of this community dub themselves) also have the ability to rate and review each others' blogs as well as join interest groups, which are community forums for specific topics. Users can post comments much like a discussion board in these groups and post websites that apply to the specific topic.

StumbleUpon uses knowledge of user preferences to deliver targeted advertising. A small proportion of the 'stumbles' users come across (typically less than 2%) are sponsored pages matching their topics of interest. For example, those signed up for photography will occasionally see an ad related to photography. Such content is vetted by humans for "quality and relevance" prior to its delivery. Paid accounts (referred to as "Sponsors") have a variety of options, including the ability to turn off such advertising.

In July 2006, StumbleUpon had 1,000,000 users. According to the contact import page StumbleUpon has over 1.9 million members as of February 28, 2007.

On December 13, 2006, StumbleUpon launched their StumbleVideo site at http://video.stumbleupon.com/. The new site allows users without a toolbar to "stumble" through all the videos that toolbar users have submitted and rate them using an AJAX interface. The site currently aggregates videos from YouTube, Google Video, and MySpace Videos.

On February 12, 2007, StumbleUpon launched a version of StumbleVideo for the Opera browser that runs on the Wii console.Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts.
Virtual Magic is a human knowledge database blog. Text Based On Information From Wikipedia, Under The GNU Free Documentation License. Copyright (c) 2007 Virtual Magic. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".

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