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The design of Tumblr, the blogging tool and social network, is guided by feeling. In particular, the feelings of David Karp, the company’s 26-year-old founder, whose instincts tend to run counter to current Web conventions. Tumblr does not display “follower” counts, for example, or other numerical markers of popularity that are viewed as crucial social-media features, because Karp finds them “really gross.” The culture of public friend-and-follow reciprocity that theoretically expands a social networking service can, in his view, “really poison a whole community.”

As the dispute between Viacom and DirecTV continued Wednesday, the conglomerate yanked access to some of its more popular programming that was available free on company websites. Fans can no longer watch full episodes of shows like "SpongeBob Squarepants" and "iCarly" or "Jersey Shore" and "The Daily Show," which is sure to further anger the 20 million DirecTV subscribers who continue to find a dark screen when they change the channel to Viacom-owned nets like Nick, MTV, Comedy Central and VH1.

Yahoo has been the victim of a security breach that yielded hundreds of thousands of login credentials stored in plain text. The hacked data, posted to the hacker site D33D Company, contained more than 453,000 login credentials and appears to have originated from the Web pioneer's network. The hackers, who said they used a union-based SQL injection technique to penetrate the Yahoo subdomain, intended the data dump to be a "wake-up call."

Yahoo Inc. said Thursday it is investigating reports of a security breach that may have exposed nearly half a million users' email addresses and passwords... The little-known group was quoted as saying that they had stolen the passwords using an SQL injection -- the name given to a commonly-used attack in which hackers use rogue commands to extract data from vulnerable websites.

Facebook announced that it is testing an online-banking service with Australia's Commonwealth Bank expected to debut this year. The new system lets people make payments to other Facebook users, and will become a test of how well Facebook can handle the deep-science realities of financial privacy and security.

Reddit has lifted its ban on popular news publication The Atlantic, thus allowing its users to submit links to the community news sharing site once again. The news publication — along with BusinessWeek, Phys.org, GlobalPost, Discovery News, ScienceDaily, and others — was first put on a domain blacklist by Reddit about a month ago, as VentureBeat previously reported. Reddit management determined that these sites were guilty of artificially promoting their content on the site.

Hours after "Internet doomsday" kicked in, major service providers say almost all customers have avoided the shut-off of their Internet service, although there are some who will not be able to read this story online, unless it's on their smartphones. "Less than 1 percent of Cox customers are infected with the virus," Todd C. Smith, Cox Communications director of media relations told msnbc.com. "Since midnight last night, when the FBI (via the Internet Services Coalition) disconnected the servers associated with this botnet, we've only received a miniscule number of calls, but our customer care and security assurance teams are standing by and are ready to help," Charlie Douglas, Comcast senior director of corporate communications, told msnbc.com.

Salesforce.com is expected to buy start-up GoInstant for more than $70 million, as the big provider of online business software beefs up its customer-service offerings.

The Los Angeles County Sheriff's Department was one of many law enforcement agencies nationwide warning Internet users about malware that threatened to knock about 64,000 Americans offline Monday.

Chris Hughes’s first business venture worked out nicely. As a teenager, he helped start something called Facebook. Within four years, working mostly part-time, Hughes vaulted into the ranks of the stratospherically wealthy. He wasn’t quite 23 years old.