Google Apps has released new features in Google Docs and Google Sites. Google added version history to uploaded files in the document list as well a drop down list in horizontal navigation and new sharing experience.
In Google Docs.
Now you can upload new versions of the same file to your document list. Previously, each time you updated a file, you would have to upload the new version as a new file with a new URL, re-share it, and put in the correct folders again.
In Google Sites.
Drop down menu in horizontal navs
Sometimes, you want to group information using drop downs and now you can by going More actions > Manage site > Site layout.
New sharing experience
Today, Google extended this simplified sharing experience to Google Sites, unifying the sharing experience across Google Docs and Google Sites. As with Google Docs, Google Sites now be set to one of three visibility options: private, anyone with the link, or public on the web.
For more details click on the link below: