I have been somewhat lax about blogging for the last six months or so due to having been even busier than usual with various projects, and I think that's likely to continue for at least the next month or two as I work to finish the first version of parallel query for PostgreSQL. If you have been following the PostgreSQL commit log recently, you will have noticed many new commits building up towards that goal.
However, I wanted to take a minute to point out the presentation that I did yesterday at 2015.pgconf.eu, which I have now uploaded to my presentations web site. The title of the presentation is "Planning Parallel and Distributed Queries". If you have not closely followed the development of parallel query, you might find this presentation interesting to review, because it gives examples of the types of query plans I hope that PostgreSQL will be able to generate in the future.
(Everything in the talk represents future work ... and not all of it will be in 9.6!)