I did a little research and found CSC guys are working on other types of cases, for example, I-140 for professors and NIW. The total advances in days are 755,930,540,949,600,743 for the past 6 updates ("total advances in days", is the summation of all advances in days between two updates for all types of cases, i.e., rows in the processing time table). It seems they are working as diligently as usual, just shifting focuses around. Reasonable to me.
In addition, last year (2004), there had no advance for EB2 I-140 between Nov. 19, 2004 to Jan. 21, 2005. On Jan. 21, 2005, the processing dates jumped from the "stalled" March 22 to May 7. I am guessing next time when the dates for EB2 is updated, it would be somewhere around early or mid September. My ND is September 2, and I am optimistic.