Tired of ever-fluctuating FeedBurner counts being displayed on your blog? Why don’t you just display a weekly average? Cats Who Blog has a tutorial that shows you how you can retrieve the numbers via the FeedBurner API, average them, and display a rounded figure.
Why do the stats fluctuate in the first place? In addition to the occasional FeedBurner flakiness, the service measures the number of feed aggregators that have pinged the feed in a single day. Stats, of both RSS and website page views, tend to be lower on weekends than weekdays, for example.
How to get a more relevant Feedburner count [Cats Who Blog]