I don't think i've seen these much in this list. These either haven't been mentioned, or i agree with strongly:
1a. Better afp/smb browsing and usage. Navigating a largish peer-to-peer network of smb shares is quite frankly awful. I know the current method is basically a graphical off-shoot of how unix does it internally, but (and this is the only time i'm gonna say this) why not nick the 'Network Neighborhood' from MS...it was a really nice thing. Make it even better though
Put it in Computer -> Network. Easy. Also, i've had a couple of file corruptions when transferring large files over smb. Not sure who's fault that is though...
1b. Better FTP support. It's unusable at the moment.
2. Window shade. Tried it. Loved it.
3. Virtual terminals. Invaluable. If something crashes and most stuff freezes, get to another terminal and kill it! It'd save many a needless reboot.
4. Customisable network Locations. I wanna be able to run a shell/AppleScript when I change location. It'd be mighty useful. Kinda like a run-level, except not so drastic.
5. Applications in the apple menu. To launch an app that ain't in the Dock, you can either open the Applications folder in Finder and leave a window open, or put your Apps folder in the dock, where right-clicking gives you a pop-up menu of apps. The former is ridiculously inefficient, the latter is slooow at showing the contents of the folder, as it seems to read through the whole thing every time. Basically, I want an Apple-made FruitMenu.
6. Menu Bar clock shows date. It's not hard. Do it.
7. ShutdownItems. Nuff said.
8. PHP included with apache. Maybe...an hour's work, max. Small thing to do, huge gain. Non-geeky users need never know it's there.
9. Package Manager. The amount of times i've wanted to remove a .pkg file is huge. I found an app to do it, but this is basic functionality that needs to be implemented.
10. More descriptive media icons. I think they exist, but they're not used for some reason.
11. '+' button should maximise. I know this is not typical MacOS behaiviour, but the 'make a bit bigger' thing is just silly.
There are a couple of other things, but they are more to do with specific apps.