PDK3.0.h is the latest version of the PDK published on the Symbian developer site. Here is a walk through some of the new release features that you can now play with. This is pretty much still “under” development so you canparticipate and make it better.
As mentioned on the video, we have running our first Test Day on the Symbian^3 Homescreen during 3 session on 29th March. If you are interested on participating, check the Bug Squad page.