Google docs on Android phones

I recently acquired an Android phone, and was hugely disappointed with the functionality of Google docs on Android. Or in fact the complete lack of functionality. There are a couple of free apps, but nothing that does what I want.

I want the phone to be the primary storage for some documents (i.e. those I use mostly on the phone). But I want these to be automatically backed up to the Google docs server. And when I access Google docs online I want to know how current the version I am looking at is.