Today Microsoft have pushed out a new build of Windows Phone 8.1 for the Developer Preview. Build 8.10.14176 address update issues with the preview release (80188308 error) and for the first time Windows Phone 8.1 Update is available for HTC devices including the 8X and 8S (it is currently installing on my old 8X). The update also makes the Lumia Cyan update available for more Lumia devices according to the Windows Blog:
Finally, we know that many of you Lumia users on Developer Preview have been patiently waiting for the Lumia Cyan update. We started delivering the Cyan update to a few Lumia devices a few weeks ago, and are targeting a whole lot more starting today. We’ll continue to add more Lumia devices every couple of days over the coming weeks until we bring everyone up to the latest.
If you are on the developer preview you check for an update in the Update setting.
Via Windows Blog