Few links with nice updates about CAB.
In case if You don’t know, You can find CAB here.
You can download the CAB and "hands on labs" (HOL, just arrived) from workspace donwloads site.
Recently, there was a webcast about CAB, where it was explained and some parts of HOL were shown. Check it out here.
And at last, the MSDN link of P&P site, where CAB is announced.