I don't think you would qualify. It is only for businesses with less than 10 computers. If you have more, you need to jump to the next one, which I am sure is not free.

http://www.microsoft.com/en-us/server-cloud/system-center/endpoint-protection-2012.aspx

I know I talk about Susan all the time, but she is the Diva of all things SBS, and is usually way ahead of Microsoft. If you go to her blog and type "I'm going naked," you will get an interesting article on A/V. Let's just say she is not too enchanged with A/V vendors. Plus, there is enough on her website to read until Microsoft drops the 2012 Server line.

Bert
Pediatrics
Brewer, Maine