Another day, another two hours of work on it.
Some UI elements without code behind them (the "filter article" thingie), and a feed properties dialog.
A (IMVHO) better UI distribution than akregator. Consider this screenshot:
The article list and feed tree are the same size, but removing the tabs and moving the filter into a toolbar really makes the actual reading area quite larger.
Delegate all links from the reading area to the desktop's web browser (this is not a web browser yet ;-)
Progress report for web page loading (more useful once you can declare a feed as "load link directly")
Finished feed/article navigation (next/previous feed/article unread/any), and fixed bugs in the part that was already done.
Zoom in/out for the web view
Several bug fixes
And yes, still fun!