Something that worked for us may work for you
1. Facebook is a great instrument for creating buzz. Create a facebook group for your product.
2. Whenever an early adopter helps himself with your site in some way, ask for his permission to advertise what he did with the site, how it helped him, and how this will help other users on the site.
For Instance:

I just wanted to thank Nir for the great idea which went really well (and still ongoing) with our Facebook campaign.
ReplyDeleteIf any of you wish to take part or follow us please 'Like' the EAT Wizard Facebook page at: https://www.facebook.com/pages/EAT-Wizard/427854593970134
I already sent a message to 2 dieticians I know, wait them to replay :)
ReplyDeleteThanks Lior! (:
DeleteThank you very much!!!
Delete