People seemed 50/50 on the idea - with several good suggestions that it would make a good additional feed, but the current feed shouldn't be changed.
Davertron suggested Yahoo Pipes as a way of creating a new feed from the existing one, so I took his example and enhanced it to produce one: http://pipes.yahoo.com/andrewducker/hackernews
It also gave me a chance to play with Yahoo Pipes, which turned out to be pretty flexible and easy to use.
Feel free to use the new RSS feed - and if you decide to clone the pipe I created to enhance it further, then just leave a comment!