Money and the App Store: a few figures that might help an indie developer
thegamebakers.com
thegamebakers.com
This mirrors quite closely my own appstore experience, I'm looking forward to reading through the various post mortems you mentioned.
To keep this comment from just being a "thank you", a few stats of my own:
When reducing an app from $9.99 to $.99, downloads go up 10x. When reducing an app from $.99 to free, downloads go up ~10x-20x.
Being featured increases downloads by ~30x.