Interesting. Just took a slightly more detailed look at my AWS charge for the past three months. Data transfer is around USD14 per month, which pays for around 45 Gb of transfer. Almost all of that is my podcasts. 1 Assuming an average podcast size of 20 Mb, which is not far off, that would seem to amount to 2000 downloads a month, unless I've got my exponents wrong. That's more than other stats are telling me, but not by much.
I reckon I can afford to stay in S3 for a little longer, at least.
My static site is hosted there too, but I can imagine the downloads for that are huge. I need to see whether I can break them out.