• Twitter, the subject of Fortune's cover story this month, is reportedly in advanced talks to buy third-party application TweetDeck for around $50 million. The potential acquisition comes at a time when the social network is trying to go mainstream. (Wall Street Journal)

    • Wal-Mart paid over $300 million to buy Kosmix, maker of a social media platform that organizes content by topic. (Its most well-known product is probably the real-time social media filter TweetBeat.) (All Things D)

    • Netflix is planning additional Instant streaming plans for later this year. At least one of those will allow an account to stream content to multiple devices at the same time. (GigaOm)

    • Over at The New York Times, Evelyn Rusli takes a look at MySpace founder Chris DeWolfe's latest effort, MindJolt, an online game company he bought last month. Last week, he scooped up Social Gaming Network and Hallpass Media to augment staff and add mobile games to the company's Web products. (New York Times)

    • Apple filed a patent suit against Samsung, claiming the company's Galaxy smartphones and tablets infringe on several patents and asking for injunctions, actual damages and punitive damages. "It's no coincidence that Samsung's latest products look a lot like the iPhone and iPad, from the shape of the hardware to the user interface and even the packaging," an Apple rep told All Things D. Of course, Samsung won't take this lying down -- it will respond to Apple's allegations with appropriate legal measures of its own. (All Things D and AFP)

    • In other Samsung news, the South Korean giant announced a "strategic alignment" worth $1.375 billion with Seagate that will basically expand the two companies' existing relationship and better position them against competitor Western Digital. As part of the agreement, the two will combine hard drive operations. (TechCrunch)

    • Popular file-syncing start-up Dropbox grew more than 500% in 15 months, from 4 million to 25 million users. How's that for viral marketing?(Fortune)