Google Sites users can now easily insert / upload photos “to & from” Picasa Web Albums using “insert photo” and 'Upload Photo' tab in insert dialog. You can also access any announcement page as a feed by adding posts.xml to end of that announcement page URL. Feeds’re also available for site comments (add "comments.xml") and site activity (add "activity.xml"). Announcement and comment feeds follow the permission of the site and require authentication for private sites. Also added a ability to create custom page templates that lets you define default content as well as settings, like layout, that other collaborators can use when they create a new page. For e.g., if you’re working on an intranet site, you can create a department page template and use that template for each department page.
Source:→ Google Docs