No, we don't do prioritized site reviews based on forum requests. Editors choose their own priorities when they are editing.
Yes, we do decide which area is most appropriate. But we do that for every site (not just the ones referenced in this forum), and we do that (very efficiently) at dmoz.org
The "waiting process" starts over from the beginning every day. There is never any continuity from day to day. Your site will either get reviewed today ... or it'll start over all over again tomorrow, regardless of what you do.
No, we won't help you compete. We're not into competition here. We cooperate with people who are cooperating with placing the sum of human knowledge online. If your site gets listed at all, it will not be because it competes with anyone, but because in some way it DOESN'T compete -- that is, in some way it presents information for which there is NO competition.
If you're worried about competitive position -- there are many people who can help you, and I'd recommend you consult with some of them. But from your point of view, we're the people who are already helping some of your competition. And anything we do for you, we'd happily do for ALL your competition -- first.