The ultimate goal of this is to try to get the websites that are running on my home system onto a web hosting provider, where CPU and disk I/O are at much more of a premium. So far, it improves the time loading the front page of my blog by about a factor of 360 (yes—not 360%, 360 times) on the local network when a cached respones can be used , which should make it quite fast enough to run even on a shared hosting system like dreamhost.
URLs with query parts ("?…") are never cached, so if you read me via rss, may I suggest to use the URL http://emergent.unpythonic.net/_atom if you are not already.
If you spot any problems, drop me an e-mail.