Hi,
We do encourage people to use SEP Small Business Edition 12.1 instead of Small Business Edition 12.0
However if you are using 12.0 this download might help you.
SBE 12.0 Product life cycle details
More details about product life cycle are available here:
http://www.symantec.com/business/support/index?page=releasedetails&key=54619&searchid=1311515821687
Thanks Gurupreet !!
good info