I started coding jReader with a single purpose in mind - to create a new kind of RSS service that will be as fast and responsive as possible. Because of this idea, I chose not use use any kind of PHP frameworks or even objects at all.
(With the exception of the built-in MySQL library.)
For this reason, you will not find the usual MVC architecture in this project - and I must admit it would scare the hell out of me if I saw such a code.
The thing is - PHP itself it not written in objects either. To be as fast as possible, I have chosen to follow this principle myself. Creating an object just to deliver a static RSS feed that updates every hour or so did not quite seem the best approach for me.
For all you who were awaiting a MagpieRSS update or clone which you can just plug into a project - I am sorry, this is just not it. There will, however be a JSONP API available, so you will still be able to reuse jReader in your online projects :)