The Apache MyFaces project is very active on the JSF 2.0 front.
Recently the first alpha of the MyFaces 2.0 package has been released. Download the alpha here. Today, the Apache MyFaces Trinidad community also released the first alpha release of its JSF 2.0 efforts. Get the download here.
In the middle of January we expect to see the next alpha (or beta) of Apache MyFaces Core. The 2.0 package is pretty stable so far..