During the last two days I extended the userfriendly plasmoid to show not only the comic strip from userfriendly.org but also other comic strips (e.g. dilbert or garfield). As the name doesn't match any longer I renamed to to 'comic' plasmoid. The code is still located in playground, however after some more code cleanup and adding a configuration dialog I'll move it to extragear as suggested by Aaron (@Aaron: thanks for the flowers by the way :)). Below you can see the obligatory screenshot of the current state:
As you can see the applet provides buttons (yeah, they look ugly, better ideas or code is welcome ;)) now, which you can use to browse all comics of the past week.