Peer39, a NYC-based ad exchange, has raised an $8.2 million second round from Canaan Partners, with participation from JPMorgan, according to VentureBeat. It has now raised $11.2 million, including $3 million earlier this year. The company is trying to apply natural language/semantic web technology to advertising, in hopes of delivering more relevant ads and better ROI. There’s little available info on the company, which is still in stealth mode.