There are other needs for a shortened URL. Perhaps you have to hardcode a link in code and don't want to be tied to a page whose contents may break. If you control your URL shortener, you can hardcode your shortened one, and update the redirect as needed.
I wish instead of a protocol improvement that focused solely on network resources, the next version will also include improvements for users such as encryption by default and doing away with cookies.
Newsblur[0] is a great open-source[1] feed-reader that not only beats Feedly in ease of use, but also has a bunch of great additional features over the standard RSS reader, with apps for both iOS and Android to complement the killer web-app. I highly recommend it.
Another great Bloom Filter library not mentioned in this article is Bitly's implementation on GitHub[0]. It has the best of both worlds: a C implementation and higher-level wrappers (Golang, PHP, Python, and Common Lisp). If you don't want to play around with a fancier DBMS and really just want the damn filters, I would look here.