Google Alerts are emails automatically sent to you when there are new Google results for your search terms. Recently Google has added Google Groups to its engine choices. This is great news, as newsgroups change content faster than most Web sites. ID-Gmail, the most hiperactive Indonesian Google Groups, for example, continuously sends/receives hundreds of email per day.
Using the same Alerts management page as with Web and News alerts, Google has simply added Groups to the drop-down selection menu.
Google, Groups, Alerts