They will send you a text message or e-mail whenever it's in stock online at a store you choose to track. There were several places that had stock over this past weekend but they went fast, 20-40min. I for one just broke down and ordered the bundle from the Microsoft store. I should have my new investment sometime next week. : )
I find it hard to believe they actually had people working "round the clock" on a holiday weekend to resolve this issue. They probably only really started putting time into fixing, stabilizing, or rebuilding whatever it is that is wrong today.