Two weeks ago we published a Plumber's Wishlist for Linux. So far, this has already created lively discussions in the community (as reported on LWN among others), and patches for a few of the items listed have already been posted (thanks a lot to those who worked on this, your contributions are much appreciated!).
We have now prepared a second version of the wish list. It includes a number of additions (tmpfs quota! hostname change notifications! and more!) and updates to the previous items, including links to patches, and references to other interesting material.
We hope to update this wishlist from time, so stay tuned!