Widgets are definitely something Apple is missing out on.
Now they just need to give us those on portable devices.
While it is true that not many devices do have hardware brightness control, c'mon this is apple..they normally think of this stuff. As a major contender in the ebook sector now, the iPad will likely take over the kindle for ebooks and having a manual adjuster on the side for late night reading is really a no brainer. I'm sure 2nd gen will have it.
My biggest gripe though is still my old whine about no arrow keys or forward delete on the keyboard.............
iPad 1st Gen 16G
My MacBook uses F1 to dim and F2 to increase brightness.
The one really glaring omission, for me, is the ludicrous manner in which you need to switch from one email account to another (within the same app)! Astonishing that we're at version 3.2 and this still hasn't been addressed.