The concept of import/export, files, printers, database are all the same thing. These should not be seperated. An application should use 1 to 3 kio's (file stream, page, && table/sql). The conversion between fileformats should be external to the application. During the open/save dialogs, the applicable choices should be allowed. Likewise, the printer should simply be part of output (it should be a page kio).
This would allow :
1) a clean seperation of import/export from application,
2) new ideas to be easily added in the future (perhaps via a plugin on the open/save dialog)
3) the constant re-use of import/export code. If somebody creates an output of png, and a 2'nd person creates a conversion of png->jpeg, then the application is now able to save in jpeg. Likewise, if app does a page kio of PS, and somebody follows up with PS->tiff, then a nice fax interface is easier. Or perhaps PS->mng, etc.
Finally, the Location menu should be easily configurable with shortcuts to these. Allow a user to add what they want. I don't believe in paper, so I have no need for a printer. But I would love to send the data directly to kmail or kopete to send a file directly to someone.

That is indeed impressive stuff :)!