We currently have around 80,000 bloggers in our lists, but those lists are not used like traditional mailing lists, because of the constant new growth and attrition in the blogosphere. With each new client, and each new outreach, we identify with the client what the demographic is they want to reach, then we ID the bloggers who are leading and influencing that demographic. We call these groups of bloggers that we identify as the group influencers a "universe".