Ready to be published? LXer is read by around 350,000 individuals each month, and is an excellent place for you to publish your ideas, thoughts, reviews, complaints, etc. Do you have something to say to the Linux community?
Ubuntu has daily images for its development cycle, and you can always download the latest version for the distros that is being worked on right at the moment. Or at least you could until Ubuntu 15.10. It seems that no image has passed testing for a few weeks.