today Charles added a little image viewer part for Konqueror so you can have a cute little view for viewing image albums in Konqueror. note that this adds one more button to the toolbar, and weighed against that the feature really isn't that compelling IMHO. neither are several of the other views that each result in a toolbar button. bottom line is that this system simply isn't extensible: having more than even a couple view plugins makes the toolbar far too cluttered with stuff you will use rarely if at all.
the situation is similar with other parts of Konqueror, such as embedded previews. there is no way for the user to know they are in a view-only mode (unless they already know that's how it works) and there is no easy way to jump into an edit mode. this has resulted in many mimetypes being set to "Open in New Window".
konqueror is very well designed under the hood. but this great design is betrayed by the interface that wraps it. yes, the GUI is a bit cluttered but that's not the biggest problem (even if people relentlessly rant about it). it's a big problem, but not the biggest. it's more a symptom, really.
the Real Issue(tm) is that Konqi's user interface has never been finished.
view plugins should be coallesced into a single menu on the toolbar. it would even be cool if clicking on the menubutton would by default select the most appropriate view for the currently viewed contents.
there should be a visible indicator that one is in "View only view mode" with a way to easily launch an editor for that mimetype if any exists (this means it must be easily visible, not in a context menu or in the menu bar).
there are many such items in our user interfaces in KDE: well designed technologies that lack a finished user interface to them. we really need to get better in this regard and _finish_ our user interfaces so that we can enjoy those awesome technology decisions and designs fully.
of course, not everything is bleak. there are some apps in KDE that i think are doing a great job in this regard, in particular the PIM space. kopete and kontact have made great progress and a lot attention is being paid to the UI there. kudos.