It looks like the change I made to MacMegasite had a big effect on my bandwidth & CPU usage.
A few days ago I was seeing stats like this:
Data transferred: 205.68 megabytes
Since I’ve been using a permanent redirect in my .htaccess for the RSS feed, it looks more like this:
Redirected requests: 14,875
Data transferred: 179.58 megabytes
The difference corresponds roughly to the number of hits I get for the RSS feed.