An idea: as google reader will shutdown soon. It will be fun to have an RSS reader online available for each user.
Provide as a plugin, each user could have it's own (private) RSS reader.

Some example:
KrISS Feed: https://github.com/tontof/kriss_feed (only one file : 300Ko)
selfoss: http://selfoss.aditu.de/
cartulary: https://github.com/daveajones/cartulary
Gregarius: http://sourceforge.net/projects/gregarius/