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.
Normal usage: $ more c14.py | sprunge
And it outputs: http://sprunge.us/eCeM
The nice thing about sprunge is that you also have syntax highlighting: http://sprunge.us/eCeM?py
Appending a ?<lang> will syntax highlight the text according to the lang.
P.S.
To use a pipe with sprunge, put an alias in your .zshrc / .bashrc:
alias sprunge="curl -F 'sprunge=<-' http://sprunge.us"
and then use source ./zshrc ( or .bashrc ).