Just saw this in another forum (Modaco, posted by necosino)
"Microsoft Office 2010 and Office Mobile 2010 was just released an hour ago, tools you use every day at work, home, or school, to the screen of your Windows phone with rich interfaces especially designed for small devices. you can download the free beta from the following *Beta Download Link
Features:
-View and edit your Microsoft® Office® documents with confidence.
-Stay connected to work from anywhere with SharePoint Workspace Mobile.
-Stay connected to work from anywhere with SharePoint Workspace Mobile.
-Use PowerPoint Mobile as a presentation aid.
*Beta available immediately for the US market and will be rolled out to the international market later. Only available for Windows Mobile 6.5 and touch screen devices only for this beta. Final version will include for non-touch screen devices. "
http://marketplace.windowsphone.com/...ffice%25202010
Sign in, "Purchase" the app, then log onto Marketplace on your phone and it will be listed under "My apps" -> "Ready to Install"