KDE 3.5.10 shipped 10 months ago and on the KDE site there is no sign of a release schedule for a 3.5.11. So I do not know if bugs were discovered or fixed. Also I am uncertain about the support status of the libraries KDE 3.5 is build upon (qt3 to mention one). But let's stop speaking of 3.5...
First of all... thanks for the information!!! I now see n-up in the options menu! I missed its appearance after the latest updates. Good news!
On the other side, I truly hope the odd/even page selection and the kdeprint application can also arrive first or later... unfortunately, the current duplex options are good only if you have an expensive duplex printer. Also, to print from say a legacy CAD application without a kdeprint dialog application can be tough. With regards to kdebluetooth4, the site you mention has not been updated in the last 6 months, so its hard to appreciate the progress. I expect it to be there, but you must agree that desktop effects and screensavers are getting a better "communication" effort right now.
And I'm sorry if my comments could be exchanged for an accusation. That was not my point at all. In the end I am a KDE user and the one who did not complain about the 4.0 experimental release! Conversely, I only wanted to point out that while I can enjoy all the effects and cuteness of KDE 4 at home (where I have no problem to use pstools or the multivalent pdf tools from the commandline to do odd/even page selection), at the ".3" release still I find issues in advocating KDE in productivity environments where certain features (communication with mobile devices / sensibility wrt paper and ink usage) are taken for granted.
And I also wanted to point out that the wishlist you find on the website is most likely the wishlist of people enthusiastic enough to write their wishes on a website. It may show different priorities (smooth scrolling at the very top) from the wishlist of people who merely use the desktop as a tool.