"When will dart be available in chrome" was deleted.
There is no problem for me; it was a genuine question, since dart was new to me, but I could understand the objections. Still, when the date is known, a question like "When will dart be natively supported by Chrome" in Google should also yield Stack Overflow. In order to do so, it's even better to have it ready and indexed beforehand. To have google hits on questions is one of the main goals of SO as far as I know.
In Stack Overflow the question was deleted, so Google will yield http://www.google.com/support/forum/p/Chrome/thread?tid=75df0ee29ec2c6cb&hl=en this one and others, but no Stack Overflow when the question can be answered.
Why should not we be able to ask questions here that can only be answered in the, of course somewhat near, future?