The guys behind Posterous have put up Posthaven as a sucessor to Posterous which was acquired and then killed by Twitter. Interesting to read their pledge.

Who’s doing it?

Garry Tan and Brett Gibson were two of the cofounders of Posterous in 2008. Posterous was acquired by Twitter in 2012, and while we were happy that it was a meaningful acquisition for the team and investors, we were bummed to see something get shuttered that we believed should last forever.

We know how to build every aspect of a great site, and we’re setting out to do it again.
Why are you doing this?

We want to build simple, useful, usable software for people. That’s what we love to do. We’ll never sell this site. It’s not for sale. Ever. Not negotiable.