AMD Possibly Launching Ryzen CPUs Before or During GDC
This technically counts as a rumor currently, but it is possible AMD accidently let slip a release window for the upcoming Ryzen CPUs. Starting February 27 and going to March 3 is this year's Game Developer Conference (GDC) and naturally the event schedule is being put up online for attendees to make plans. One of the session being held at GDC is labeled "Optimizing for AMD Ryzen CPU," and in its original description it said "Join AMD Game Engineering team members for an introduction to the recently-launched AMD Ryzen CPU…" The description has since been revised if you look at the GDC webpage, but not before several people noticed and took screenshots of the original text.
If we assume the original version of the description was posted in error, but was not itself incorrect, that means we can expect the new line of CPUs to launch by the end of February, assuming they do not launch during GDC. If this leak is incorrect, then the latest information I have seen still is that Ryzen is still on schedule for a Q1 release, so we do not have too long to wait, either way.