Google sets billing rates for App Engine
infoworld.com
infoworld.com
http://www.computerworld.com/action/article.do?command=viewA...
All of free is still there, but if you want more...
$0.10 per CPU hour[1]
$0.10 per gigabyte transferred in
$0.12 per gigabyte transferred out
$0.15 per gigabyte stored per month
$1.00 to be able to send 10k emails per day instead of 2k
There follows some confusing discussion of reducing free quotas and doubling the free storage quota. I think what they are getting at is tuning so a well written app will fit snugly in the quotas at 5M page views per month.
[1] pg, can I please have some sort of UL or OL formatting? I promise to still try to write literately, but I like lists too.