As well as Google Sites, I use a lot of Google products. I like to keep abreast of what's new in the 'Googleverse' and so I monitor quite a lot of blogs etc so that I find out quickly about new products and changes to products. For those that have a passing interest in things Google I thought I would set up a News page where I would post items that I think are of particular interest. If you use a RSS feed reader you may subscribe to the feeds for these News pages.
The facility to subscribe to a daily or weekly digest of these feeds by email.
A script to process emails and post to a Sites Announcements page