What do the WGA nominations mean for the Oscars?

After today's nominations of the WGA awards, there is only one major award nomination to be announced and that is the PGA awards on Monday. That being said the WGA has helped some films and hurt others.
First off Zodiac got a needed nomination if it wants to stay in the race at all, it really needed a DGA, WGA and PGA to have a shot, but since it did not receive a DGA nomination it desperately needs a PGA nomination now. If it does in fact get that nomination, it still has a shot at being a surprise Best Picture nomination. Juno also got a slight boost for it's Best Picture hopes, although everyone expected it to get this nomination. It deserves a screenplay nomination, just not a Best Picture nomination and I am still one of the few who does not believe it will get one. Although, I said Dreamgirls wouldn't get one last year and I looked like a genius later so, who knows. Strangely enough I believe Laura Linney got a little boost today because The Savages got a nomination and any press for this film helps her out. Lastly, Michael Clayton got a another big boost after Tuesday's DGA nomination and it is looking like more of a realistic possibility then ever.
There were also several films that took a huge hit today. Atonement was crushed again with no mention at all. If it does not get a PGA nomination it's dead; if it wasn't already. Sweeney Todd also took a big blow and is in the same situation as Atonement but has less of a shot. Looks like this year's Oscar race is narrowing down some, but it is still crowded and insanely difficult to predict. It will be quite exciting when the nominees are announced!