#Wikimedia chapter wants to get its message out, there are all these networks to choose from. Often it is only a matter of configuring your social network. Sometimes you need a tool like TwitterFeed . It helps me by creating a tweet. By using hash tags in the first two sentences, people are likely to find my blog post.
There is a nice article at ehow that explains how you have to set it up. An added extra of TwitterFeed is that it allows the use of OpenID.