SE isn't starting any new blogs at the moment:
We've learned a lot by creating these per-site blogs for any site
which asked for them. However, we at Stack Exchange have not been
doing enough to make blogs work - neither for the contributors nor for
the communities that are associated with them.
On our network, any site will have generated some amount of valuable
content; it's what we’re set up to do. But ours is a platform that
promises an engaging community, one that responds. We strive to
eliminate those cases wherein someone finds a question they need
solved, only to discover that it was posted 4 years prior with no
response. This is why we shut down sites in private beta, and even
public beta. Blogs aren't Q&A, but the spirit remains the same - a
blog with content but no updates is a promise unfulfilled by our
network.
Right now, out of the 22 community blogs on the Blog Overflow system,
only 10 have posted within this year, only 4 of which were within the
past 3 months. 6 more posted something most recently within 2013, and
the remaining 6 posted last in 2012. This has caused the image of the
blogs on our network, internally and externally, to be viewed as
inactive and disused in general, drowning out those few who remain
dutifully active.
Much of this is our fault: we never successfully integrated blogging
into the normal experience of asking and answering questions. We may
someday find a way to do this, but it won’t be tomorrow - and it’s not
fair to anyone to keep encouraging participation in a broken system;
their efforts would be better served finding ways to share their
knowledge on the main sites.
Many thanks to everyone who participated in this experiment thus far -
I do believe we’ve all learned something along the way. Existing blogs
will continue to be hosted and supported as long as doing so is
feasible, but no new ones will be created.