Microsoft is of course showing of Windows Phone 7 at CTIA, and had a live demo of the OS there.
The video above appears to show a slightly more advanced build than the one on the emulator at present, and shows us some more of the Windows Phone 7 office hub. Seeing Excel Mobile rendering a spreadsheet pretty well does give me hope that the experience, at least for viewing documents, will be very good.
As of yet we have not seen much of OneNote, but hopefully at least that applications will be optimised not just for reading but also for data entry on the go.
Video via Krunkermedia