Bellevue, WA-based ActiveRain, a social network for real estate professionals, has raised a $2.75 million first round from HouseValues, a publicly traded real estate info company. The site offers the usual social networking features, such as profiles and a blogging platform and it claims to have racked up 65,000 members since its June 2006 launch. In addition, ActiveRain runs Localism, a retail site that offers info organized by topic and region, and plans to launch its own blogging service aimed at real estate professionals. Announcement. (via Seattle PI)