If you've ever wanted to change the color on a number of lines at once, the new bulk operations feature will nicely complement folders. The Markers and Shapes boxes, along with folders, now have a Bulk Ops link at the bottom.
Bulk operations can only be run on one object type at a time, so if you click Bulk Ops on a folder with both Markers and Shapes, you'll have to choose.
Once that's done, you'll see a full page dialog listing each object with some options at the bottom. Click or shift-click to select a group of objects.
The Print Individual Maps option is only available for saved maps. It will open a multipage PDF in a new browser window, with one page per object. Each page is automatically centered on the object and scaled to fit, with a minimum scale as specified. The default is 1:12k, which strikes a nice balance between capturing small map details and not losing context.
Change Attributes will bring up a second full page dialog, similar to the object's details dialog. All fields start off blank, any changes made will be propagated to the selected objects. Beyond setting marker and line styles, you can move objects between folders en masse.
Delete Objects will obviously delete the selected objects, although not without bringing up a confirmation window.