If you’re old enough (and sufficiently geeky) you probably remember ICQ. The Israeli-developed instant messenger, with the green flower logo and goofy "uh oh” notification sound, had 100 million users at its peak.
ICQ eventually wilted within AOL, which bought the company a couple of years before its disastrous merger with Time Warner. Now, Mail.ru Group, an Internet company controlled by Russia's richest man, is trying to bring ICQ back from the dead.
