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• Facebook clone for the enterprise created by Yammer

  Yammer, which launched two years ago as a Twitter clone for the enterprise, is now revamping itself with a new platform that looks almost exactly like Facebook.

• Will Twitter attack drive off IT interest?

  This week's Twitter hack may not immediately drive corporate executives away from the microblogging site, but it may raising some early warning signs.

• Twitter knew about worm bug a month ago

  A serious bug that led to a series of fast-spreading worms on Twitter's website Tuesday had been fixed in August but was accidentally re-introduced.

• JPMorgan Chase deposits blame, sort of, for outage

  JPMorgan Chase is trying to move past three days of problems on its online banking site with an apology and an explanation that seems to put the cause on a third party.

• Revamped Twitter site takes flight

  In an effort to refresh the Twitter.com site, pull users back in from third-party platforms — and take a swipe at Facebook — Twitter launched a significant site redesign on Tuesday.

• JPMorgan Chase's online banking site crashes

  JPMorgan Chase is blaming "technical issues" for an outage to its online banking site that may well be one of the longest outages by a major provider in recent memory.

• US university to temporarily ban Facebook and Twitter

  Harrisburg University provost Eric Darr wants to know if his students can live without Facebook, Twitter, instant messaging and other social networks for an entire week.

• North Korea signs up to Twitter

  North Korea has established its first official presence on Twitter.

• In an emergency, would you tweet for help?

  If you couldn't reach 911 in an emergency, what would you do? Call a neighbor? Scream for help? Post a plea for <a href="http://www.computerworld.com/s/article/9172378/Social_networking_addicts_updating_from_bed_bathroom">assistance on Facebook</a> ?

• Microsoft to thank Google researcher for privately reporting Windows bugs

  The Google security engineer who stirred up a hornets' nest two months ago after publicizing a critical Windows vulnerability said Friday that Microsoft will credit his work on four of the 34 bugs slated for patching on Tuesday.

• Fake femme fatale shows social network risks

  Hundreds of people in the information security, military and intelligence fields recently found themselves with egg on their faces after sharing personal information with a fictitious Navy cyberthreat analyst named "Robin Sage," whose profile on prominent social networking sites was created by a security researcher to illustrate the risks of social networking.

• Twitter moving into its own datacentre

  Twitter is to move into its own, custom-built datacentre later this year, in an attempt to improve reliability.

• Apple iPhone software chief joins Twitter

  Scott Forstall, Apple's Senior Vice President of iPhone software, has joined Twitter, which has been hopping with tweets this week surrounding the iPhone 4's technical problems.

• Twitter to promote marketers' special offers

  Twitter has introduced another advertising service, hoping to generate revenue this time by promoting special offers, events and one-time deals from marketers.

• Firefox add-on encrypts Facebook and Twitter

  Firefox users worried about Internet eavesdropping are being offered a new way to encrypt their interaction with a range of popular websites, including Facebook and Twitter.