Lots of businesses use Twitter as a central hub for things like customer service, and today at its Flight developer conference, the company is introducing two new Gnip APIs to make it much easier. Gnip, Twitter’s social information API set, is introducing a new Audience API to provide metadata on who is viewing tweets. Companies may get access to customer defined data like age, sex and geographical location. Additionally, and engagement API lets businesses know what effect tweets may have. If a popular figure tweets that a particular airline sucks, that company may learn that and choose to address that tweet faster to… This story continues at The Next Web