The Morning Lowdown 02.10.2011

»  Activision (NSDQ: ATVI) shuts down its music game division and production of existing Guitar Hero titles in order to focus on its online strategy. The company blames continued declines in the music industry as the catalyst for Guitar Hero‘s closure. Insiders think Activision will shift its focus to multiplayer and even social media-type games. [Rolling Stone]

»  Discussions with at least some potential suitors — which include Google (NSDQ: GOOG) and Facebook — for Twitter have produced an estimated valuation of $8 billion to $10 billion. Insiders say Twitter’s revenue may be between $100 million and $110 million this year, up from 2010 revenue of $45 million. [WSJ

»  Andreessen Horowitz has invested over $80 million in Twitter by purchasing stock in private secondary markets. Early investors and employees with stock options are the ones who’ll get to see this money. [AllThingsD]

»  Super Bowl XLV has set a new record for tweets per second for a sporting event. The event garnered 4,064 tweets, shattering the record of 3,283 tweets held by the World Cup soccer tournament last summer. In fact, the World Cup record was broken six times over the course of the game, particularly during early touchdowns and the halftime show. [Search Engine Land]

»  Instapaper now offers full API access to developers but it will only work for customers with $1/month subscription memberships. So far, developers had been creating unofficial, not-fully-functional apps. [TheNextWeb]