Then it stopped.
Status still shows Campaign as Active and AdGroup's keywords as Strong. But there have been no more impressions generated after the first 249. Our primary keywords are probably usually somewhat low in traffic compared to other more exciting categories (our primary keywords are "military school" and "military schools") but AdWords is certainly giving lots of ads on those keywords.
The only change I can think of is that I added two more ads and on one of the ads I had a request to remove excessive capitalization (I had used our school name's acronym "FUMA" in the ad). I changed the ad as requested and the campaign appeared to continue to run following that.
I've sent two form emails using the "contact us" form and received no reply in 36 hours or so.
We are planning to devote up to $10,000 on web advertising in the months of July and August but this unexplained stagnation on Google has me frustrated.
Odds are its partly due to your ads needing to be reviewed, and as it was a holiday weekend, the staff is a little behind.