Talking about new Zune versions and a possible Zune Phone, here is a video of the ZenZui interface originally created by a Microsoft spin-off company. Its mission? To compete with iPhone...
From ZenZui Inc. :
conceived in the research lab by experts in human-computer interaction and data visualization, and refined over three years of development, ZenZui represents an entirely new way to discover and consume the mobile web. With ZenZui, your phone screen is a portal into your own customized Zoomspace, an information landscape of personalized, cached content that we call Tiles because they reflect your lifestyle. Using a single thumb, you fly in and out of your Zoomspace -- two simple taps gets you directly to any Tile. Through some clever engineering, we constantly refresh your Tiles in the background, so they're always fresh, available, and ready to be Zoomed.
Mobile browsing no longer needs to be a slow and painful experience. ZenZui: Choose your Tiles. Stop Surfing. Start Zooming.
As you can see ZenZui has been created with interoperability in mind. It works on both touchscreen and normal mobile phones:
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The new ZenZui mobile interface