does anyone know if the update lets us use USB 2.0 devices with any mac except the iMac?
Why? You can't use them now?
I've never had a problem using USB 2.0 devices on any Mac, although one third-party PCI card I tried in my PMG4 was flaky.
If you think it will somehow make a 1.1 port run at 2.0 speeds, however, that's not going to happen. That would require new hardware.
Although the Exposé and Dashboard buttons work for me now, I still get a low-power notice when plugging my 2G iPod Nano into my keyboard's USB slot.
And you always will. Your keyboard has a non-powered hub in it. It can't provide the current needed to charge an iPod. If you don't want to attach your iPod directly to the computer, you'll have to buy a powered hub. (Unless you have the new aluminum keyboard attached to one of the new iMacs. ...)
oddly I just plugged a new alu keyboard into my macbook for the first time, and ran software update, it gave me version 1.2 but only 22.9Mb
So the full version is 22.9Mb, the update is 35?Mb??
I would assume that you already had the previous keyboard update (1.1) installed. Mac OS updates are the same, with smaller updates for those upgrading from the previous version and large "combo" updaters for everybody else.
As for what this does, I'll see when I get home. Although I don't have one of the new keyboards, the previous keyboard updater allowed me to assign functions to the F13-F15 keys on my Apple Pro keyboard (the one that came with my PowerMac G4, not the keyboard from a Mac Pro, although they probably behave the same WRT this problem). Unfortunately, the settings don't persist after a reboot or logoff. Hopefully, this update will fix that.
UPDATE: This update didn't fix that. Apparently, when the Dashboard/Exposé keys are set via the keyboard shortcuts control panel, they don't survive a logout. They have to be changed via the Dashboard/Exposé control panel, which doesn't allow you to choose F14 or F15. Fortunately, I did find
this article which explains how to hack-in the mapping by editing the plist file, which worked, so I'm happy.