One of the endpoints is Twitter. For that, I'm relying on TwitterFeed, because I have developed a good relationship with Aditya Chadha, who is the developer of that fine service.
1. I post something to my linkblog feed.
2. I pull a string on TwitterFeed telling him that the feed updated and he should check for something new.
3. He checks, and finds something new. Shortens the link through Adjix (run by Joe Moreno, another developer I enjoy working with) and then pushed the link to Twitter.
4. And voila, the link appears on Twitter. Look ma no hands. I did it all from the UI of my.reallysimple.org.