I've been considering it for a while. It's a simple mechanic so not exactly deserving of a standalone application. But I do think it can be leveraged so I would likely start with something that shows a way to leverage it.

There is a client somewhere out there that displays multiple feeds in column layouts. I was thinking perhaps I could aggregate the user's follow list and allow people to have a one-click method for loading up feeds from their follow list. Basically shorten the process and remind people it can and should be done. It is an effective method of discovery for sure.