Google Docs Viewer for Mobile
Good news is upon us for Google Docs users. One can now go to docs.google.com from your Android (or other mobile device) browser, and view native Google Docs documents as well as .pdf, .ppt, and .doc(x) files previously uploaded to your Docs account, in a mobile-optimized viewer. Unfortunately, editing is still not available, but it is no longer necessary to download the file if a quick glimpse is all you need.
To get the whole story, visit the Google Mobile Blog.