I'm pleased to say that after some very hard work in the past few weeks, version 2.0 of the plugin has now gone live.
The new version has a totally revamped codebase, I focused on the plugin's architecture, and it is now using custom post types for storing the feed sources and imported feeds. For those of you who have a lot of sources, you should see a good leap in performance when rendering the page with your imported feeds.
If you are upgrading from a previous version, version 2.0 should retain your sources, please let me know if this doesn't happen.
There is now a new option to limit the number of feeds displayed, and I've removed the previous organisation of 'Today', 'Yesterday', etc.
Let me know if you encounter any problems!