In addition to submitting it to the App Store as a standalone app, I'd highly recommend componentizing your work and selling the source or a library through Cocoa Controls or BinPress.
+1 because I want access to the library, because I want every app out there to buy it from you and use it, and because I think the real goal of a project like this (just like the design prototype which inspired it) is to get Apple to recognize that this is how all text should work iOS-wide.