Justin Pfister has created a Googe News RSS Generator. Just enter your search tems and the results page will be an RSS feed. I tried a few terms and it seems to work rather well.

One suggestion would be to have the 'results' page simply list the URL of the feed, rather than showing the feed itself in the browser. That along with simple instructions to 'copy & paste' the URL into your RSS reader.

One comment on his blog wonders if Google will attempt to shut this down.