I just saw this site after a tweet by Bill the Lizard from Stack Overflow. Some Stack Exchange sites (the only non-trilogy site with a blog right now is Gaming) have blogs. There's a page about guidelines for starting a site's blog. More recently, there was a Stack Overflow blog post about getting a blog started.
There are four key things to discuss:
Raise the idea on the child meta. A community blog needs the involvement of community members.
That's what this post is doing. Getting the idea out there, and getting some high level ideas flowing.
Define the scope and purpose of the blog. Is the blog about the site? Is it about the site’s topic? Is it about the industry around the topic? Keep in mind the audience of your community and their interests. Another generic blog about may not be all that interesting.
I don't see why we can't start this discussion now, either, before moving on.
Recruit contributors. Who will write entries for the blog? Starting a blog is a bit like going through the buffet line. Be realistic – don’t let your eyes be bigger than your stomach. Think seriously about if and how often you will be able to contribute a blog post, including research/prep time.
There are a lot of heavily involved people at Programmers who are pretty good writers (at least when it comes to answers). Looking at the top users, a few names stand out in particular. I would be interested to see who would step forward, however.
Plan a schedule. Given the results of steps #2 and #3, think about a rough idea of a schedule for the blog. Will there be one post a week, posted Mondays? Will there be posts on Tuesdays and posts on Fridays? You don’t need to be pushing out postsdaily, but I would say at least one post a week.
This would be much further down the road, once we have topic(s) and contributors.
I suppose to kick off discussion, there are two questions to answer at this point:
Should Programmers have a blog? Why?
What topics should be covered by this blog?