Official Google Blog: Templates now available in Google Sites:
"I'm pleased to announce we just added a stocked gallery of site templates in Google Sites. Anyone can browse the public template gallery, and businesses using Google Apps each have a private area where employees can share site templates with coworkers.
The rate that businesses are adopting Google Sites has surpassed our expectations, and templates will make Sites even more useful by dramatically reducing the time it takes to set up collaborative workspaces like employee intranets, project tracking sites, team sites and employee profile pages. Templates let you quickly start a new site with pre-built content, embedded gadgets, page layouts, navigation links, theming and more."