Wal-Mart Stores, Inc. (NYSE:WMT) has acquired mobile and social ad targeting company OneRiot. OneRiot will be integrated into Walmart Labs. OneRiot recently shifted their business model from a search portal to monetizing its real-time ad network. Now OneRiot provides its social targeting service for mobile ads within apps.

Facebook has added a new button called “Subscribe” within the social network. This makes it easy to filter out information that you don’t care about such as when someone plays a game on Facebook. You may also want to see more stories from your friends and less from co-workers.

AT&T Inc. (NYSE:T) has announced a new monthly plan that provides 250 anytime minutes and unlimited messaging for $25 starting on September 18th. Other prepaid services that are launching includes a $10 international long distance package which includes 250 minutes within a period of 30 days and per-use roaming in Canada at $0.39 per minute, $0.25 per message sent ($0.20 per message received). Below is the full press release:

Sprint Nextel Corporation (NYSE:S) is ready to launch the Apple Inc. (NASDAQ:AAPL) iPad on their network. Sprint would be joining Verizon and AT&T in the iPad data club. The iPad for Sprint is expected to be available starting this holiday season. Sprint is also believed to start offering the iPhone this holiday season too. According to sources with 9to5Mac, the new iPhone is expected to be launched on October 7th at a price of $199.

The three rival companies AOL, Inc. (NYSE:AOL), Yahoo! Inc. (NASDAQ:YHOO), and Microsoft Corporation (NASDAQ:MSFT) are partnering with each other on ad sales. The three are partnering in an effort to effectively compete against Google. The three companies are also aiming to gain back ad spending that ended up in the hands of other ad networks.

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Microsoft Corporation (NASDAQ:MSFT) has announced the Samsung Windows Developer Preview PC today. This PC is the first Windows 8 tablet. At the Microsoft BUILD 2011 conference in Anaheim, California, Windows President Steven Sinofsky demoed the device.

Apple Inc. (NASDAQ:AAPL) is preparing to start shipping the AirPort Express portable 802.11n base station. Currently Apple’s online store still has the “AirPort Express Base Station with 802.11n and AirTunes.” Apple is wrapping up the release of AirPort Utility 5.6 as well as pointed out in developer notes: “Adds support for the AirPort Express 802.11n (2nd Generation) base station.” Airport Utility 5.5.3 was released this past June. [AppleInsider]