You can change the audio to match the channel you want to focus on by using the SAP button on your remote. The channels default to a rotating barker (for News & Sports) or Radio Disney (I'm pretty sure that's what was there this morning) in the case of the KidsMix channel.
As you move forward through the SAPs (they've got 1 through 9 lit up, mind you) your sound will move to the next channel whose video is in line on the screen.
On one hand, I can see the benefit (and even for the Shopping version for the handful of QVC junkies out there), but on the other hand, I'm greedy. I'm still looking for more new SD content.
This could have waited until they addressed some of the content concerns.
There are plenty of channels that they could be adding to distance themselves further from cable. But we're left with a system that is on par with most of the urban digital systems out there. D*/E* beat cable on price, but even that advantage goes away once cable begins to truly outstrip satellite in terms of channels offered.