news.debuntu.org

After a number of years in development Linux Test Drive is becoming a reality, from the page:
LTD is a project that has been in development for the last three years. LTD allows the user to determine which distribution best fits their needs utilizing the Linux Distribution Chooser, and then once that is determined, give the user the ability to "test drive" that distribution directly over the Internet, without the need to download. We are currently taking pre-beta registrations for the LTD system.
read more