In addition to update to Google Presentations that lets you embed a presentation into your own website. Google also rolled out a couple of other changes to Google Docs, including the ability to create sub-folders. The top bar above every Google Docs folder went through a little design change as well; though still a little bulky, it takes up less space than before.
Google choose an interesting way to visualize the hierarchy: folders can be expanded inline by clicking on the small arrow placed in front of their names. The left sidebar doesn't show any subfolder, but this is probably a flaw that will be fixed soon.
The folders from Google Docs continue to also act as labels, even if it's more difficult to treat them this way and the language used in the UI doesn't help too much. To add a file to a new folder you need to click on "Move to", select the folder and then click on "Add to folder".Google, Google Docs, Google Presentation, Subfolders, New Features