There's a picture on page 88 off the D2 manual, which you can get in PDF from the Pioneer website and probably some retailers' websites, too. Nothing to get excited about - XM is implemented far better from the looks of things. It looks pretty much just like the FM radio interface. I am still trying to puzzle out setting the display options - it looks like you can select it to display ONE useful item but only one - i.e., you can have it show station number OR station name, show artist title OR song title - but not both, which is ridiculous.
I might be wrong about this - the interface screen for setting options is, IMO, a beta-level implementation at best, and the manual is not much help.
Still, it works - I am able to listen to Sirius just fine. The interface is not elegant or well thought out (figuring out functions of the scroll wheel was a particular challenge/frustration at first).
Hope that helps.