It’s expected to see iOS 6 (build 10A5316k) this week at WWDC 2012. And as you may know, Apple puts up iOS links for firmware when they release it so people can directly download it. Apple has put up the download links for iOS 6 beta a bit early, according to some staff of Chinese forum WeiPhone.com. Although the links won’t download iOS 6 beta for any devices yet, they contain iOS 6 beta for many devices and a developer preview of Safari 6 for OS X Lion.
These links aren’t confirmed if they are the real links to download iOS 6 beta this week. But assuming they are, it seems that first-gen iPad (1) and iPod touch 3G will not have support for iOS 6.