The Windows Mobile 6 SDKs have been released. you can download them here. there are 2 available: Windows Mobile 6 Professional and Standard. Professional is if you are developing for Touch screen devices (Originally Pocket PC and Pocket PC Phone editions, now called Classic and Professional) and Standard is for non touch screen phone devices. Downloads weigh in at 150mb+ so broadband defiantly required! :)

There is some more info available on Zandorna Mobile, and the Windows Mobile Team blog.</p>