I wished that Apple would release PATCHES rather than having us download the entire SDK + Xcode every single time.

How convenient, just finished downloading the previous version of Xcode!

That's how it always is. :(

This guy's posting pictures: http://www.razorianfly.com/2010/09/15/breaking-ios-4-2-beta-...

Interesting that the hardware orientation lock is now "mute" (so, more like other iOS devices) and they've moved the orientation lock function — and added brightness control — to the multitasking dock.

"added brightness control to the multitasking dock"

Hooray!! I turn the brightness all the way down when I use it late at night or early morning and this will be much easier then Home > Settings > Brightness

Definitely. The iPad desperately needs this control, because brightness can only be controlled in an app using a private API reserved for iBooks.

Once someone gets it on their iPad, can you report back with supported AirPlay apps? Does anyone know if it can be supported with say the MLB app or AirVideo?

Appears that AirPrint will only work directly with HP ePrint printers. Kind of disappointed...

Not quite, you should read the press release[1] more closely (emphasis mine):

HP’s existing and upcoming ePrint enabled printers will be the first to support printing direct from iOS devices.

Also, if you have access to the iOS dev program, read the release notes for 4.2.

1. http://www.apple.com/pr/library/2010/09/15airprint.html

Where do you get the 'only' from? I'm sure it is all standards based and that Apple wants all printer manufacturers to support this.

Also, it works with Printer Sharing on your Mac. Which will be the gateway to whatever printer you already have.

Why not just use the standard print queues instead of inventing your own print queue standard and calling that standard?

So they don't have to pack 6gb (or whatever ridiculous size it is on OSX) of printer drivers in iOS?

For one: Linux packs them quite small and somehow Ubuntu fits everything in it's 700MB ISO. Second, you could have the more obscure drivers download over the air, or as a package from the app store.

Even if they can minimize their size, it's one of those things that has persisted in its present state for too long. Why isn't there a standard for (at least consumer-level) printer communication? I think this is just another case of mobile device constraints necessitating overdue reform.

If that's what you want, you could have the best of both worlds if printers ran CUPS. Then you could have backwards and forwards compatibility.

Does anyone have airplay working yet? I was kind of hoping that it'd support streaming music from iTunes to the iPad, but that doesn't appear to to be the case. =/

Airplay is meant to work the other way around - from your iOS device to another device - e.g. an AppleTV, a fancy receiver, a networked TV, etc.

I was hoping it would support both means of playback. I don't really see why it shouldn't.

For example, I have far more music on my laptop and such than I do on my iOS device, so it's significantly more convenient to stream music from iTunes to an iOS device when I'm at home (say, downstairs with my iPad) than to sync that music over manually.

No sign of a SDK for it yet that I can find, unfortunately.

have it working and installed now. it's great. runs well and smooth.