Google announced today that it was adding shared folders to Google Docs. With shared folders any file placed in the folder is shared amongst people with access rights to the folder.
To share a group of items, all you have to do is put them all into a folder and share the folder. As you'd expect, if you add an item to a shared folder, it will automatically be shared and if you add someone to an existing shared folder, they will instantly get access to all of the folder's content.
So now you can have a single folder containg Docs, Spreadsheet or Presentaiton files. Sick.
Other features added include easy to upload multiple items and more for a complete list see the Google blog here.