An appeal to anyone working on Reader substitutes: Please incorporate tagging

I'm as outraged as everyone else that Google Reader is shutting down, but I have faith that someone will create something very similar to what Reader does now.

Google is easing the transition to other readers by allowing us to save our subscriptions, starred items, and other data from Google Reader.

But one thing that doesn't appear to be making the jump is any of the data related to "tags" in Google Reader. It doesn't seem to me that enough has been said about preserving tagging.

This is an appeal to anyone working on Google Reader substitutes: Please include tagging as a feature.

I've spoken to one software developer who is trying to figure out how to scrape everyone's saved tagged data from Reader to eventually import it into a new reader, but interest from others seems few and far between. Plus, saving the data will come to nothing if new RSS readers don't have something akin to tagging.

Is anyone else upset about losing their tags?

Is anyone else working on a way to save them?