Phones
Versions being sent to mobile phones via SMS have also become common recently.
Web based
Chain letters have become popular on MySpace (in the form of myspace bulletins) and Youtube (in the form of video comments). MySpace chain letters are often coupled with intimidating hoaxes.
The Katu Lata Kulu chain message on YouTube has been a popular chain message in many videos. The original message states that the spirit of a girl from Africa that was killed would take the spirit of anyone who hadn't forwarded the message. Since the Katu Lata Kulu chain message started, many YouTube video comments had the chain message retold on their video comment page, angering many users to retaliate by creating parody videos as well as messages about the Katu Lata Kulu chain message curse.
Some may seem fairly harmless, for example, a grammar school student wishing to see how many people can receive his e-mail for a science project, but can grow exponentially and be hard to stop. They may contain false information, such as the famous "Forward this to everyone you know and if it reaches 1000 people everyone on the list will receive $1000" type e-mails. They may also be politically motivated, such as "save the scouts, forward this to as many friends as possible". Some recent chain e-mails say that a company "will stop its free email service if you don't send this message to X people". Some threaten users with bad luck if not forwarded. There are many forms of chain e-mail that threaten death or the taken of one's soul by telling tales of other's deaths, such as the Katu Lata Kulu chain e-mail, stating that if it is not forwarded, the receivers of the message will be killed by the spirit. YouTube and Myspace are sites which frequently gets threatening messages to users, stating that if the chain is broken and the message is not forwarded, the receivers of the messages will face death by the spirit of someone who has died.