The popular news site was temporarily shut down to protect its users.
In today's technology roundup: Facebook deploys SSL security, UK edges closer to mobile wallet, Amazon debuts Kindle Singles, and TalkTalk talks massive job cuts.
A local site is registered in the name of Groupon's local competitor.
The company will also unveil its mobile one-click payment solution at FinovateEurope, next week.
In this World Wide Wrap: Alibaba lowers shipping costs, China sees e-commerce boom, and Google extends offerings.
In this World Wide Wrap: PayPal in Federal Reserve row, Starbucks eyes mobile payment, and Charge Anywhere turns to Android.
The SEO software set has become the de facto standard for Web site optimisation, says Tradepage.
In today's technology roundup: Nokia dumps X7 release plans, Google Earth and Chrome debut in Iran, holiday shopping boosts eBay profits, and Heathrow unveils iPhone ticket app.
In today's technology roundup: Jobs takes medical leave again, US and Israel behind Iran nuclear attack, cyber war risks 'over-exaggerated', and Facebook's ad revenue balloons.
In this World Wide Wrap: Pension body to deploy Oracle suite, Plimus' Perfecto Mobile goes live, and Malaysia sees first virtual digital mall.
The new version includes many major additions and improvements for business, the company claims.
Posting and browsing content could be as simple as sending an SMS.