PingFM Auto Social Network Bookmarking
If you can’t be arsed to blog and tweet about your website through social media sign up for an account with ping.fm
PingFM is a free service that allows you to update multiple social networking and bookmarking websites with just a few clicks. Most browsers will have a plugin or addon that will allow you to submit your bookmark to pingFM
Take a look at the links down the left at the bottom, these links and pages were generated by a WordPress plugin.
There is another free service provided by onlywire.com too.
Get an account with both these providers and social update at the click of a mouse.