Let's not exaggerate. Whether or not Delay was involved in any of Ambramoff's corruption, Delay's relationship with him was far more than just knowing his name. Anyway, Bob Ney is most likely to cough up others from his own state. I doubt Delay is in jeopardy from this.
Well, that's the point, isn't it? DeLay is guilty of knowing Abramoff from other (presumably legal) ventures. Apparently those ventures are not a major topic of investigation here. (Although they were probably thoroughly reviewed.) If DeLay was getting bribes, he was doing a pretty poor job of it, considering Harry Reid managed to pull down more than anybody (except maybe Ney, I forget the details).
According to the article, Ney accepted $34,000 in bribes. We know that DeLay's family accepted $500,000. DeLay is in serious jeopardy.