Social sharing is becoming a big contributor to traffic for many sites. While Facebook and Twitter drive more sharing than any other services, Google is trying to compete with Buzz, which is now part of Gmail but shares links to article and blog posts through Google Reader.

Are you a budding Web entrepreneur who would like some pointers or advice from seasoned company founders? MayField Fund and First Round Capital are sponsoring a raffle to give away mentoring sessions with the founders of Digg ( Jay Adelson ), Flickr ( Caterina Fake ), Mint ( Aaron Patzer ), Ning (G ina Bianchini ), Slide ( Max Levchin ), and Zynga ( Mark Pincus ). The raffle will take place at a private event in Silicon Valley with space for 100 attendees on March 1

One common complaint about Digg is that you have to visit the site to actually digg anything. Well, unless you use the Digg toolbar, which caused a bit of  controversy when it launched last year. But last month, Digg announced a new API that made it so developers could finally create apps that would allow for the digging of items outside of Digg.com

It took a little while, but Digg finally has a new head of PR. The company has hired Michele Husak, who previously held the same job at Pandora, the streaming music recommendation engine.

High Gear Media , a publishing company focused on automotive digital media, is having a great year. The Palo Alto, CA-based vertical content startup raised a second round of funding last Summer to the tune of $5.5 million and has been growing like a weed.

It was exactly five years ago today that Digg went live as a simple site where you could vote on your favorite content from around the web.