I've been out of the loop lately, but I noticed that there is a new release of WinFX synced with Beta 2 - “Avalon” and “Indigo” Beta1 RC. So, I thought I'd try migrating some of my projects to Beta 2. But alas, I have no idea what happened to System.Windows.Forms.Integration.ElementHost, it's not even mentioned in the Release Notes. It also doesn't help that I can't find the documentation :( Update: Oh, there's an SDK. Stay tuned.