I'll say the same thing I said about the iPhone SDK: They should take their time and get it right. The worst thing they could do is allow a lot of shoddy resource hogging, crash prone, applications get out there. They also need to ensure good backwards compatibility. They can't release an alpha quality SDK today and break everyone's apps in 3 months. End user experience is very important and making people scared and weary of third party apps taking over their phone (multitasking has some downsides eh?) would be a horrible mistake. Take your time, do it right.
