Event-based social net Going.com has raised $5 million in a second-round financing. Backers included Highland Capital Partners and General Catalyst Partners, who participated in the first round. The site, initially called HeyLetsGo.com, is headquartered in Boston and specializes in organizing events in cities such as New York, San Francisco and Chicago, as well as its home base. Going.com raised its $3.5 million first round back in November, which helped support development of the site’s technology. Release