The user-generated review hub is among the latest in a string of social sites that have announced plans to go public.
Activists said Sudanese police arrested and beat hundreds of students at Khartoum’s main university Friday.
A banned toy protest was among several demonstrations staged across Russia Sunday ahead of March’s presidential election.
Explosion, gunfire comes ahead of Yemen vote to replace Ali Abdullah Saleh, its president of more than 30 years.
The plan to install a tent village at the site.