I'll post this here as well. First, read this article by Mike Colligan:
http://thehockeywriters.com/tomas-vokoun-injury-salary-cap-ltir/
Specifically, look at option 2 at the bottom of that article.
Now notice that, according to CapGeek, the result of these moves is that the Pens are sitting at $1,990,833 over the cap.
Add to that the fact that Shero specifically stated, "What our roster is on Thursday, it might not be the same [as 5 p.m. Monday]. We'll wait and see." (quoted from a PG+ post:
http://plus.sites.post-gazette.com/index.php/pro-sports/penguins-plus/122902-shero-bylsma-on-roster for those who can read it).
Oh, and since Conner already cleared waivers, they've got a few days where they can still send him down without him having to pass through them again.
If I had to guess, Conner and Ruopp won't be on the opening night roster. Bennett will be. Despres will have to toil in the AHL until they decide to send Maatta back to Juniors. But that's just my guess.