At the end of August Amazon announced that CloudFront now has an invalidation feature which can clear the files from the edge locations before the expiration period.  The other day I got to try out this new feature when I had a file I needed to update and didn’t really want to wait the 1hr TTL that I had set.  I downloaded the newest version of CloudBerry Explorer which supports the new feature and gave it a try.  It didn’t seem to be instantaneous, but the roughly 10 minutes I had to wait was much better than waiting the hour.  Not sure if this time delay is what everyone else experiences or if it was something on my computer caching it longer.