I had short, but interesting dialog with sun on groups.drupal.org regarding how to go about getting a better menu interface into core. Sun maintains the Administrator Menu project and it sounds like the module might be earmarked for core inclusion in Drupal 7. The discussion got me thinking about what it would take to unify the efforts of module creators and maintainers and develop really solid api and tool set for getting around in Drupal. I maintain the Navigate module, which is a proof of concept for the kinds of tools I'd like to see, and I've been trying to decide if I should continue improving the module, or see if I can combine efforts with other like-minded folks in the community to can get something good enough for core.
Leisa, the usability professional working with Mark Boulton on the new Drupal 7 design, mentioned that what Drupal really needs is a genuine interfacelift (get it, interface + facelift? </whimsy>), not just small incremental changes. To this end, they set up a booth at Drupalcon soliciting ideas for improving Drupal's administration system, and have recently posted the videos. This 'facelift' might be a perfect opportunity for getting the infrastructure required for new - more usable - tools into core.
It's premature for me to assume that this kind of effort would be welcomed in the community or that I will have the resources to head up the process, but - at least in my head - it seems like it could have a much more lasting impact than releasing an updated version of a single administration module among many.