I've been toying with the idea of a Chaos 2nd army for a while now and really like the Deathwing SM army, but don't want to play SM.
I drew up a quick list of what I would need for a PlagueWing army:
1.) Termies
2.) Delivery system (Chosen, Raptors or Bikers)
3.) Nurgle on everything (it's not ChaosWing, it's PlagueWing!)
4.) Keep unit sizes at 7 (keep it somewhat fluffy, not a HARD requirement)

With those parameters I drew up the following 1,000 Point list:

HQ - Chaos Lord - Termie Armour, Mark of Nurgle, Daemon Weapon - 155pts
Troops - Plague Marines x7 - Champ w/pfist, plas gun x1 - 216pts
Troops - Plague Marines x7 - Champ w/pfist, plas gun x1 - 216pts
Elite - Chaos Terminators x7 - Icon of Nurgle, Champ - 260pts
Fast - Chaos Bikers x3 - Icon of Nurgle - 149pts ==================================================
996pts
25 models
39.84 points per model
43.37% Troops
26.10% Elite
15.56% HQ
14.95% Fast Attack

Issues raised with this list:
1.) Bikers are too vulnerable. With only 3 of them if one dies they *may* run.
2.) Not enough delivery systems. Only icon is the bikers.
3.) Basic troops not defended enough. Was suggested to bring rhinos for each Plague marine squad in order to work as mobile terrain and get them in range faster.
4.) Termies need upgrades. I know a reaper autocannon would be nice, but can't squeeze it in points-wise.

Possible fixes:
1.) drop termy squad to 4 or 5, freeing up points for upgrades of termies and rhinos.
2.) change 3 bikers (who will be testing after the first kill) to 5 raptors with an icon who will have to take 2 kills before a test is needed.
3.) specialize termies. not sure how, close combat or shooty? one would say that a CC termy would really benefit from his 2+ save, but a shooty termy would benefit from being able to move + shoot heavy weaps.