Let me start off by saying that I'm not against a blog. I'd love to have one for EL&U, but I see a lot of pitfalls, considering the subject area EL&U covers, as compared to other SE sites. (I do have a proposed solution at the very bottom, for those of you TL;DRs).
For a blog, we have to cover something that the main site does not do so already in Q&A. Generally, I find that this requires either a lot of extensive detail in posts exploring one particular topic per blog post or a personal feel, such as in the form of reviews.
I'm worried that these types of blog posts aren't something that EL&U could sustain—how much is there really to say that wouldn't work better in a Q/A?
Putting that thought aside, let's look at the topics suggested by SE:
Interview top users.
Highlight top content.
Review a product.
Tell us an interesting story.
Explore hot topics.
Keep up with current events.
The first two are the only ones we could really do on a regular basis—English has few, if any, products, interesting stories, hot topics, or current events.
Most important part here:
The key, I think, to making a blog work for EL&U would be to team up with Writers.SE
—the two communities are related enough that I think blog posts would be mutually interesting, and we'd have a larger size topic area that allows more freedom for contributors. Of the six SE-suggested topics, EL&U can only truly do the first two, but EL&U + Writers would be able to explore all six.
Oh, and I'd be happy to contribute in any way, be it helping to coordinate or writing, or whatever.