So many ideas! I need to lock myself in a quiet room for a couple of days and experiment!
Create a RSS Mix to combine source feeds from different sites.
Integration with Edmodo - Create a RSS Mix and then in Edmodo Subscribe Group to Feed.
Hidden ability to create Google Bundles in your Reader feed. Login to Google Reader and then type bit.ly/gbmaker and then click on bottom link to activate.
My head is spinning! Thanks to Miguel Guhlin.