Sorry for the late notice, but it's been crazy around here lately. We're holding a special, out-of-cycle Test Day tomorrow for World IPv6 Day, focusing on testing Fedora's IPv6 readiness - both in the distribution and on our project sites. You can test with Fedora 15, there's no need to use Rawhide, and there's full test instructions on the Test Day page.
We probably don't need to emphasize the importance of getting ready for IPv6, and that applies to Fedora as much as anyone else, so please come along and help us test! I know IPv6 is a scary topic - it scares me too - but view this as an opportunity to contribute to Fedora while learning about IPv6 in real time from smart cookies who actually know what they're talking about. I know that's what I'm gonna do. See you all tomorrow in #fedora-test-day on Freenode IRC!