Betabeat reports that the rapidly-popular music service Turntable.fm has found an investor in Union Square Ventures. The company is reported to have raised about $7.5 million, having chosen an investment from Union Square-based USV instead of the west coast’s Kleiner Perkins or Accel. It’s possible that other investors from the founders’ other startup Stickybits may join in the funding, including First Round Capital, Lowercase, Polaris, Chris Sacca and Mitch Kapor.

BackType is a social analytics company that allows you to enter a URL to find out how big the website’s social media impact is. When you enter a URL, it shows the number of Twitter followers, retweets, Reddit comments, Hacker News comments, Digg comments, etc. that is related to that particular URL. The investors in the $1 million seed round was led by True Ventures, K9 Ventures, Freestyle Capital, Lowercase Capital, 500 Startups, Founder Collective, Raymond Tonsing, and several other angel investors.

Chris Sacca is a former Google employee and is an investor in Twitter. According to an SEC filing, his venture capital company Lowercase Capital raised over $20 million in funding as part of the Lowercase Industry Fund. In early August, Sacca raised over $11 million and another $10 million in June. Lowercase raised $8.5 million earlier this year. Some of the company’s other investments include DailyBooth, Stickybits, Posterous, etc. [TechCrunch]

Chris Sacca has started a new angel fund with $8.5 million in assets.  Sacca’s fund is called Lowercase Capital.  One of Sacca’s personal investments was early in Twitter and it is likely that he transferred that ownership to his new fund.  Other investments Sacca made personally include SimpleGeo, DailyBooth, Posterous, Stickybits, Gowalla, Bit.ly and Fanbridge.  [TechCrunch]