We need the following possibilities added as options to the Products block (along with potentially other similar types of options):

• On Sale
• Featured
• Best Sellers
• Top Rated

I'm not sure the best way to implement these. They can be implemented as stand-alone options in the Edit Mode with no further customization or they can be implemented as a checkbox or something in the sidebar block options so they can be combined with options from the Edit Mode (e.g. Show products that are a specific attribute and on sale)