Google Docs added ‘sort search results by relevance’ feature. Until now, anytime you searched for a document, results were sorted by "last modified date". Now, results will display items most relevant to search at top of list. Also a new menu on right side of toolbar, lets you decide whether you'd like to sort your Docs list by "Relevance," "Starred" or "Last Modified". “This improvement to search within Docs also includes automatic stemming and synonyms. So if you search for "check account", results will also include "checking account".
Export all your files via newly added "Export all" option, lets you export all your docs up to 2GB at a time with one click. You can also export a single file and email it to anyone you'd like in a single step. Once you select an item, click "Share" and select "Email as attachment...". Then pick which format (PDF, MS Office, etc.) you want to use to send item, compose your email, and hit send.
Finally, Google removed existing "email-in" feature in documents and files, as it was bit buggy. To address this, “we'll be taking down the feature and working on bringing it back in future with more functionality and better integration,” Google Docs blog. In the meantime, you can use multi-file upload in your Docs list or GData API to programatically upload docs. You can also take attachments from GMail and open them in Google Docs.