You're not going to like this, and I hate to be the bearer of bad news, but...
You know how sometimes when you make a schedule, you add up your time estimates for each task, look at the result, look at your scheduled finish date, and go "eh, hmm...."
That happened to us shortly after Gamefest :-)
(which is not unusual: I actually think it's good to start out ambitious, push yourself a bit, and then scale back your ambitions as and when it becomes clear they might not actually be feasible)
Unfortunately, we had to claw some time back, and WinForms integration got the chop. We decided it was more important to get our other features finished and tested thoroughly, rather than rushing too much stuff out and not having time to do it properly.
But all is not lost! You don't actually need anything new in the framework to use a GraphicsDevice in a window: it is entirely possible to do that today, and once you figure out how to set up the IServiceProvider stuff you can use ContentManager to load things in to a custom WinForm/GraphicsDevice pair as well. So although it does somewhat suck that we didn't have time to make this easier for you, you shouldn't be blocked from writing a level editor if you want to do so. At some point I'd like to make a sample or two showing how to set this up, but no promises when I will get around to that (there are a few other new samples, like probably some networking stuff, that I need to do first).
XNA Framework Developer -
blog -
homepage
