Part social network and part 3D virtual world, Kaneva also throws in a dash of YouTube, with media sharing for pictures and Flash video. I received news of the service today, but Kaneva has been kicking about since late 2004. Essentially you begin with a standard social-network profile, then earn prestige points to work your way up a site leaderboard until you're invited to join the 3D social world, which launched its beta in April of last year.