Is there a way to edit Google documents from an Android device?
We can now edit Google Docs with our mobile with the official App :)
More information can be found in this blog entry from the official Google Documents blog.
There are apps out there now that should make it easier to use google docs on your phone but an official app will be out soon according to CNET news.
Google Docs Coming to iPad, Android
I also found out this one as an alternative : http://sites.google.com/site/gdocsforandroid/
Documents to Go has support for downloading, editing and syncing your Google Docs from your device. The initial sync is slow and saving to Google Docs sometimes fails, but support is there.