There are 3 videos that explain how to use social marketing to build traffic. These videos are available at
http://www.myfyi.info/smvIf you are interested in learning about stumbleupon, bebo and yahoo answers marketing, then these videos are the perfect tutorial to get you started in driving traffic to your websites.
For more information, you should also visit these hubpages;
bebo basicsstumbleupon
yahoo answers