I have a possible topic that I could do... it's a generalization of a programming contest problem that I came across a few years ago, but the only solution offered by the website was "use brute force!" I found a better way that enables it to be a simple math homework problem. ::hopes that others will sign up to write posts, too::

I'd be willing to help read over/administer the blog, but my math background isn't as strong as some people here (I don't have analysis and some other classes), so I wouldn't be able to check for accuracy on some posts. I could help with checking for readability, though.

I think that Grigory's suggestion regarding $1+2+3+\cdots$ is a good one--if we see a sudden "pop culture" interest in a certain topic, we can write a post about it, instead of letting it get out of hand. We could even write up some articles regarding past popular questions (like that one) if we have a "lull" in ideas for the blog.

One recurring feature I'd appreciate is something along the lines of "Bringing it all together": An example of an interesting connection between seemingly diverse areas of mathematics.

@ArthurFischer I'd imagine starting off slowly is, from an administrator's perspective, ideal; it means the kinks can be worked out satisfactorily and also that if we have too few administrators there is a chance to find more. The main con is that a low frequency increases the delay between when a writer pushes forward an idea for a piece and the actual creation/posting of it. This makes it more likely they won't pull through or will lose interest.

Possible topic idea, but I want to know if it's substantial enough to warrant a blog entry: I recall seeing somewhere a while back a formula for the area of a polygon given an ordered list of its coordinates in $\mathbb{R}^2$. This formula was derived from Green's Theorem. I was wondering if a derivation of the formula (along with a few applications thereof) would be sufficient for a blog topic. This idea is somewhat useful in certain computer applications, programming contests especially.

I'll second the idea of starting slowly. I think we should start the blog with a target of one post every two weeks. If we had that as our frequency, we would have a current battery of 14 weeks (~3.5 months) worth of posts. Accounting for future "pop-culture response" posts and contest results, we might be fairly close to critical mass...

I also think it's not a big problem if we start off slowly, and I think once every two weeks is a good idea. @anorton I think your post idea about polygon areas would be great.

I think it's hard to talk a lot about logistics when none of us have used the actual blogging software. I think the main thing is we should just get things up and running so people can start writing posts, and maybe then it will become clear how to handle administration, reviewing posts, etc.

Suggestion: I think we should ensure that we have at least one blog entry completely written (not simply proposed) before actually starting up the software; that way, the time from "blog opened" to "first post" is minimal.

True, @anorton. Although something explaining a little about the blog may be a good alternative first blog post.

I definitely think it is a good idea to have one completed entry on hand when starting, at any rate.

@GrigoryM That's an interesting idea that I don't think anyone else has thought of, having the blog be at least in part consist of auxiliary posts to the site. I wonder how this would differ from asking a "definitive" answered question on the main site to be used as the question to which all others are duplicates. There is something very interesting here, though.

@anorton I don't think the admins necessarily need to have a deep mathematical background (and as Grace Note has mentioned, the mods will be admins, too). I tend to think that admin-ship would be mainly for scheduling, hounding people to meet deadlines, and in the off-chance that a specialist is needed to vet a post, to find said specialist (hopefully a math.SE user).

@KarlKronenfeld A slow start is probably necessary. It would be nice to had at least one post a week, but for a while this is much too ambitious. It'll be a learning process to begin with, and thoughts we have now will likely change. The "Fortnightly" idea is interesting, but I would certainly prefer to eventually increase the frequency.

(Posts about topics somehow relevant to the [many members of] the community is quite anothe matter though...)

(...or highlighting something already happening on math.SE... --- but I start repeating myself)

@GrigoryM I think the random math topic posts are the thing I am looking forward to the most. If I wanted to learn all of mathematics from books then I would not be on mathSE. Communication and community interaction just add an entire new dimension to mathematics.