Speaking of finally, I wonder when they're going to add proper support for "Content-Encoding: gzip". Last I checked, people would upload gzipped content and add the Content-Encoding header on top, which is inconvenient and doesn't support browsers that can't handle gzipped responses.
IE6 has problems with cached Gzip files: basically it forgets they're Gzipped in the cache and then drops the Content-Encoding part of the file. So it loads garbage as far as the JS interpreter is concerned.
I definitely want this feature as well. But I feel like it won't happen for a while because to make this happen Amazon incurs additional overhead for caching the gzipped version.