I've spent the last few days getting my.reallysimple.org ready for external development. Key to that is the JSON API that allows you to create new feeds, add, edit and delete posts, get and set prefs and build feeds.
You should be able to:
1. Write a complete app for the service running in JavaScript, much like the work we did on wikiriver.org.
2. Create a compatible back-end in PHP or node.js -- for example.
Long-term, I don't want to be in either the UI or back-end business, but I want a thousand choices in each, all able to substitute for each other because they share a common API.
That is the purpose of this API, to help serve as a "coral reef" for the bootstrap. That's why it is so important to have a fully functional server up and running. (Which I do.)
So here are the docs.
http://apidocs.reallysimple.org/
The first step is to review them, and think about whether you want to build something around this API.
If you want to, I will soon be ready to give usernames and passwords to a very small number of developers for testing purposes only. (At this time.)