LEADING THE DAY: The deadline for public comments on the merger between AT&T and T-Mobile is Tuesday. Opposition to the proposed deal has been growing, The Washington Post reported, with lawmakers from both parties voicing concerns about the implications of the merger.

Sprint will hold a news conference opposing the deal Tuesday. The Minority Media and Telecommunications Council will lend its support to the merger, saying that the deal will lower prices for broadband service, thus increasing the adoption rate by minority communities. The Association for Competitive Technology, which represents app makers, will also hold a news conference supporting the merger on Tuesday. The ACT says the deal will help alleviate the spectrum shortage.

Intel introduces “Ultrabooks”: Intel announced that it is starting production of the “Ultrabook,” a light, thin, laptop with “tablet-like” features. The company aims to shift 40 percent of the laptop market to the Ultrabook by the end of 2012, said Intel executive vice president Sean Maloney at a Taipei conference. The Ultrabooks will be less than 8/10 of an inch thick and will cost less than $1,000.

Hackers plant fake PBS story: Hackers planted a story on PBS News Monday declaring that rapper Tupac Shakur, who was killed in 1996, is alive and well in New Zealand. The group LulzSec has taken credit for the hack, and also posted the user names and passwords of PBS administrators, Forbes reported.

LulzSec has also claimed credit for some of the hacks that have plagued Sony’s smaller sites after a major data breach in late April. Sony and Epsilon, a marketing group that also suffered a major hack in late March, will both testify before a House subcommittee on Thursday.

Sony announced Monday that it will restore all PlayStation network services by the end of this week, slightly after its promised end-of-the-month deadline. Unknown hackers also carried out an attack against Lockheed Martin on Sunday.

Twitter to introduce picture service: Twitter is expected to introduce its own picture service to compete with third-party companies such as Twitpic and yfrog, reported TechCrunch.

The micro-blogging company has been moving to take greater control of its own ecosystem lately, having told developers to move away from creating applications that copy the service. Twitter recently announced it will acquire TweetDeck, one of the most popular Twitter clients, after months of rumors.

Survey finds Internet telephone use on the rise:A recent survey from the Pew Center’s Internet and American Life found that a quarter of American Internet users have placed a call online. The survey specifically asked if those surveyed were using Skype, which Microsoft recently announced it will purchase for $8.5 billion.

In 2007, using a question that was worded differently, the center found that only eight percent of Internet users had placed calls online.