I would like the ability to save a blog post draft without posting it.

I would not mind if I was limited to a certain number of drafts or to a reasonable time period to turn drafts into actual posts if you are worried about accruing lots of useless drafts.

Another thing that's on our list, didn't make the cut for launch. Not difficult to do, as a first pass we could probably even just do it locally. I'll see what I can whip up with localstorage as a stopgap, perhaps.