Short answer: Since the first half of 2007, the number of employed engineers is down 12%, while the number of employed scientists is up 3%. Perhaps a sign that we are keeping the R in R&D, while losing the D. A decline in the number of engineers is *not* a good thing.
Long answer: I just updated my analysis of engineering and science jobs during the recession. Using data from the Current Population Survey, I calculated the number of employed engineers in the first half of 2010, and compared it to the first halves of 2009, 2008, and 2007. I did the same thing for scientists. The results are, as we say, illuminating. Here are the charts.
Important caveat: Because this data is drawn off a survey, it bounces around quite a bit. So small changes are likely not statistically significant. Still the patterns look clear.