It's interesting. It'll be interesting to see how you address moderation and boosting. Since your federation page is "coming soon" and your handles appear to be

It's interesting. It'll be interesting to see how you address moderation and boosting. Since your federation page is "coming soon" and your handles appear to be globally unique, it's unclear to me who the moderators are and how you will deal with spam (defined as content that I, as a user, don't want). And perhaps consider "bootstrapping" with external content. Take a place where content is legal to reproduce and select the stuff that reflects what you want your network to be, then mirroring it. Give external authors from your content source separate identities on your system; and tag the content with the original source. StackOverflow allows this, for example (don't do this as a crappy SEO technique; rather do it in such a way where passers-by can see the kind of content you want to exist on the site).