Hi5

In 2003 Ramu Yalamanchi founded Hi5.  Hi5 is like many other social networking sites having attributes such as networks, being able to show photos, status updates, user groups, and a personal profile.
Users of Hi5 are able to create a personal profile allowing them to put in there interests, personal information, upload pictures and also create photo albums. With the photo albums it allows for other Hi5 users to comment on them.
Hi5 also allows its users to play online games and also set up music on their profiles.  Hi5 is mainly used for gamers and for playing online games. It is set up so you can still have contact with other people and socialize with them through the web.
Hi5 also allows users to set up their privacy settings, it allows people to friend people, accept or deny friend request. We all know there is creepers out in the world and Hi5 allows you to block users all together.  Another privacy setting is who you allow to see your profile.
A feature different then normal social networking sites is that it is mainly for games and you are able to create avatars.
Currently every month there is about 25 million people who visit the website and it is the 6th largest online gaming site.
Hi5 has around 100 games with more and more coming out every week. People who are set up with Hi5 are in over 200 different countries, and the site offers over 50 different languages.
Hi5 is a great way to get your gaming on and to be able to interact with people all over the world.

Sources:
http://www.hi5networks.com/
http://en.wikipedia.org/wiki/Hi5