It has its roots in a classic piece of Latin literature, which dates back to 45 BC, making it more than 2000 years old.
All Lorem Ipsum generators found on the Internet tend to repeat predefined chunks when necessary, making this the only true (valid) generator on the Internet. Use a dictionary of more than 200 words from Latin, combined with very useful sentence structures, to generate text.
Many desktop publishing packages and web page editors use Lorem Ipsum as their default text, and doing a search for "Lorem Ipsum" will return many websites that use this text if they are under development.