Since there's not (and never much has been) people seriously running DW code for any major service, I would rather for us to focus our limited development resources on our own development needs. To be totally clear, we will continue to maintain Dreamwidth the open source platform and people are very welcome to use it. You just might have to either do some of your own development or use a production environment that closely mirrors ours.
Some examples of what this update means:
* Perlbal is no longer used at DW HQ and we're removing all support for it
* MogileFS is on its way out (to be replaced by either simple on-disk storage or Amazon S3)
* Master-Master support is deprecated and will be removed
* Configuration options are being cleaned up and some things will become non-optional (i.e. compression, etc)
* No more support for 32 bit systems (think this is gone already tho)
My goal here is to make Dreamwidth development faster and easier for actually developing on Dreamwidth.org. We'll still have to make it possible (and easier!) for people to run DW (if nothing else for our own developers!) but the number of at-scale-production-configurations supported is going down.
As always, comments welcome!