I've started a new project, RssNotify, to try and learn more about developing applications using GTK. I'll still be developing cctray-gtk as this project is useful, but the RssNotify is more of a project to satisfy my curiosity.
The RssNotify project aims to provide an easy way for a user to receive notifications when an rss feed has been updated. the idea is to use notify-sharp to display the new news items. The rest of the interface will be used to try to explore the features widgets that GTK# offers.