http://blogs.msdn.com/b/b8/archive/2012/08/13/collaborating-to-deliver-windows-rt-pcs.aspx
Not much new info here but does go into more depth about winRT.... of note are dell, lenovo and samsung will all have arm based hardware.
Some more from Paul Thurrott
What Microsoft didnt tell you, however, is that Toshiba and Vizio are also delivering Windows RT devices this year.
And while I cant reveal the Windows RT device lineup Ive viewed, I can tell you that these devices will indeed be priced comparably with the iPad. As a reminder, Apple prices the iPad at $499 to $829, depending on configuration.