"At this point, we support both the iPhone and Blackberry mobile devices. Note, however, that presentations are only supported on the iPhone. Google Docs documents and spreadsheets should also work on phones that offer rich-browser support. While we haven't tested it across all mobile devices, a good rule of thumb is that the more advanced your phone's browsing capabilities, the more seamlessly Google Docs will work," mentions a note from the help center.
Maybe Google should release a mobile application that actually lets you edit the documents.
Google Docs Mobile homepage
A Google document
The painful way to view a spreadsheet
(one column, 20 rows at a time)
(one column, 20 rows at a time)
{ via Google Blogoscoped }