They will publicly announce the availability next Tuesday, May 24. By that time, all public mirrors will have the ISOs and repository ready. This will be a great release of Fedora 15, even though i don't use it in my primary desktop/laptop. I use Fedora only in my old laptop since it's working great and i don't have any complaints at all with it. It supports all of my hardware completely
Since i'am leaving for Surabaya next week, UKDW ISO Server might have a delay on the ISOs availability. You can wait or you can go to other mirror servers if you can't wait