iWork for iPad Apps Now Support MobileMe iDisk:

My favorite part of this article, “If you’re working from a Windows PC, access your iDisk with a browser at me.com/idisk and upload an existing Microsoft Office document. Copy the document into Keynote, Pages or Numbers on your iPad to view it or make edits. When you’ve finished working on the document, copy it back to your iDisk as either an iWork, Microsoft Office or PDF file.”