Thanks so much for your input. Here are the answers to your questions:
Coach Nancy: Just to clarify, it sounds like I should be eating more than my BMR. Is that correct?
ArchimedesII: I'm at the tail end of my weight loss, and headed for the maintenance zone, but those "last 5 lbs." are killing me! :( I'm 5'4" and about 148. My goal (for now) is to get to 143-145, and I'm much more concerned with getting there through a healthy and sustainable lifestyle than I am with having the weight off quickly. Also, I do two days of strength training per week, and I build muscle quickly, so I'm trying not to focus too much on the scale, but more on body composition.
Per SP's estimator, I burn an average of 2600 exercise calories per week via cardio, but I just ordered a heart rate monitor in order to ensure that those numbers are as accurate as possible.
Ok, I think that's all. Thanks again, everyone!