The Google Blog has recently announced that they have added Google Blog Search email alerts to their Google Alerts system. This will enable you to add alerts for Google News and also for other Google properties. You will also be able to add alerts for Blog Search results. Google has also taken action to enhance Blog Alerts to “show results from multiple sources (including Google News, the web, and blogs).”
You can either conduct a search at Google Blog Search and then can click on the “Blogs Alerts” link on the left hand side of the page to subscribe by email to any news alters. Or you could go to Google Alerts to set them up right there.