But no ODF?...
This is pretty cool. I already talked about how there is support for the open xml formats on the palmOS.
I was looking into the iPhone today and it looks like it has support not just for .doc, .xls, .pdf, and .html; but also has for .docx and .xlsx. Very cool!
I saw this in their product documentation: http://manuals.info.apple.com/en/iPhone_User_Guide.pdf