Today is a special day for us - by now this is old news, but here's my rejoinder: today we posted the Go-Live releases of WCF and WF. We have a click-through license (reminescent of VS.NET 2005 beta2) that allows folks to put apps that use the January WCF and WF build into production.
Some information about the genealogy of the bits: late last year we spent about a month baking the quality and stress of what we called the "beta2 branch" of WCF. That set of bits was snapped late last year and got rolled up into the January WinFX CTP (which contains the WF Go-Live bits and a high-qualilty WPF release as well). Stated otherwise, the WCF bits in the WinFX Jan CTP and in the Go-Live release are identical - except for the supplemental Go-Live license. We did it this way so that developers who use multiple parts of WinFX (e.g. Avalon and Indigo together) can build apps using the WinFX CTP, and if the service part of the app is ready for deployment, companies can install the WCF Go-Live bits on their production servers. (Of course, a WCF "client-side" app is also licensed for production use).
If you haven't yet started writing your connected app with WCF, there's no better time than now!
