A few things I wish about NetBSD:
Userland tools to manipulate cdb(5) databases and proplib(3) property lists. I actually went ahead and built a super minimal cdb(5) reader and writer. I'll post the source soon. nbperf(1) is too weird for this task.
Get rid of azalia(4). Trash it. It's a piece of garbage. I mean it shouldn't even be in the source tree. Enable hdaudio(4) by default in GENERIC.
I personally think it would be awesome to have a graphical utility which generates kernel configuration files. It'd be a sort of wizard.
There needs to be a way to programmatically discover which devices depend on which other devices, and the minimum set of kernel config options needed to get it to work. Currently I'm running "make depend" and hoping it doesn't fail. I'm suggesting something which I can query at any time, without the need to refer to chapter 4 man pages.
A perfectly painless Raspberry Pi and/or Beagleboard install, with instructions on netbsd.org (not some random person's blog).
More widespread use of cdb(5) databases. We use them for terminfo files, why not tons of other places?
More to come...