Buzz is all about showcasing the most popular stories. Click on the Buzz icon to launch the Yahoo! Buzz service. A new window will open with the source link. Add a headline and a summary to the story, give it a category and select which type of media you're submitting. Once you're signed up for buzz and submitting stories you can vote for the best stories and leave your comments.
You can use your Yahoo! ID to use Buzz or sign up here: http://buzz.yahoo.com/about/ StumbleUpon
If you have a StumbleUpon account clicking the SU button will allow you to submit any article or piece of content from IT in Canada to the StumbleUpon service.
StumbleUpon is a way to discover and share web pages that are chosen for you based on your personal preferences and the recommendations of your friends. Learn more about it here: http://www.stumbleupon.com/aboutus/