Another great product for small business is the Endpoint Protection.cloud product. There is no need for you to manage and maintain a server on site, as the manager is hosted in the cloud. There is a free 30 day trial to test drive the product, check this link for more details.
http://bit.ly/SymantecEndpointCloud
As for the SEP 12 SBE product, check out the following links for more information.
Installing and configuring Symantec Endpoint Protection Small Business Edition -
http://www.symantec.com/business/support/index?page=content&id=TECH91893&locale=en_US
Migrating to Symantec Endpoint Protection Small Business Edition 12.0 RU1 -
http://www.symantec.com/business/support/index?page=content&id=TECH97511&locale=en_US
http://www.symantec.com/business/endpoint-protection-small-business-edition
Best,
Thomas