Greetings,
First, sorry to make this non-contributory, self-indulgent post my first. 
Do you folks know of decent introductions to Heidegger’s work that at least in part focus on Being and Time, but are not section-by-section exegeses(Dreyfus, Gelven, etc.)? Thus far, I have only encountered the Poggeler, but there just must be more, right? Thanks in advance.
Yes, I was a bit confused about where to place this topic. I was about to go with “Mundane Babble” but I saw under the first philosophy forum “however vaguely linked you may think it is.” I thought it to be “vaguely linked.” I’m not bitter, mind you. 
The Cambridge Heidegger might be useful. Rudiger Safranski’s intellectual biography is also good, as is George Steiner’s.
Really though, I would simply take a pencil and read through Being and Time slowly.
James
Well if you want an introduction by Heidegger himself, I seem to remember reading somewhere that his “Introduction to Metaphysics” was meant to be something of the sort.
Any book by Heidegger, or any philosopher for that matter, is bound to have a lengthy introduction right in the text; so you don’t necessarily need to waste your time with any explicit ‘introduction to’ volumes. Having said that, I’d just go with Basic Writings as a place to start.
Basic Writings was the only book by Hiedeggar I ever read. And It was deep. So deep, in fact, that I quit about half-way through, and then resumed reading the rest of it later in the year.