It's been long in the making, but finally, I've gotten the Sereal announcement article in a shape that I felt somewhat comfortable with publishing. Designing and implementing Sereal was a true team effort and we really hope to see non-Perl implementations of it in the future. We're virtually committed to finish the Java decoder at least for our data-warehousing infrastructure. Any help and cooperation is welcome, as are patches to improve the actual text of the specification (which is kind of a weak point still).
By the way, for those who worried about the lack of a comment-system on the Booking.com dev blog before, we've added Disqus-support.
But now, I'm just glad it's out there!