Variable Width Planet
You asked, and I deliver. I made an alternative stylesheet for Planet KDE with variable width. View -> Use Stylesheet -> Variable Width. My HTML foo is weak so it has mysterious gaps at below the header and above the footer for no reason I can see, plus the top and bottom shadow effects are semi-transparent and overlap in ways I wouldn't want. But it should be good enough for those wanting something that fits on an N810 screen.
Here's some pictures to keep you amused.



