Well, after some searching, and asking on forums, I found a plugin that puts Facebook Like buttons on the blog.
Also Twitter sharing and other social sites.
I also put a FB share button, which allows people to say something about the post as well.
This is great stuff for spreading the word – if you are providing helpful stuff, people will like/share it, and then it may get seen by who knows how many people.
You can see them (hopefully!) at the bottom of this post.
Great viral marketing, without costing a penny!