More cable news from across the Web:
> Comcast Ventures said it is backing start-up Helio, a social media network for connecting to "influencers and thought leaders." Comcast blog post
> Arris CEO Bob Stanzione will be a featured speaker during the SCTE/ISBE Leadership Institute at Tuck Executive Education at Dartmouth in April. Press release
> Channel Master LLC has added live and on-demand Internet TV service from Sling TV to its DVR+ platform. Phoenix Business Journal story
> Verizon FiOS topped Netflix's ISP speed rankings for December. Rankings
> Apple Music, which launched in more than 100 countries in June, has accumulated more than 10 million subscribers. Financial Times story
> Comcast plans to give Huntsville, Ala., businesses a new option for fiber-based services with a 10 Gbps-capable fiber network. Article
> Wells Fargo Securities adjusted its estimates for AT&T ahead of the carrier's fourth quarter earnings report, predicting the carrier will post fewer postpaid adds than previously expected due to less aggressive promotions than in recent years, but higher EBITDA margins. Article
And finally… 21st Century Fox chief executive Rupert Murdoch, 84, announced his engagement to former model and former wife of Rolling Stones frontman Mick Jagger, Jerry Hall. Variety story