I think the newness about this is that they've released the code on github under MIT, so you can self-host the service if you want. I think none of the othe rprojects mentioned here have are opensource or have a slef-hosted version.
I wrote a sprunge clone with a gimmick (the URL contains the sha256 digest of the paste) to learn Go. Ships with a Dockerfile. Probably doesn't scale. Affero GPL.
