The SATA bug exists in hardware and thereís no way to provide a driver or firmware update that can fix it. The fix requires a metal layer change, which will result in a new hardware stepping (resulting in the ~3 week delay before replacement hardware is ready).
What About Current Sandy Bridge Owners?
On its conference call to discuss the issue, Intel told me that it hasnít been made aware of a single failure seen by end users. Intel expects that over 3 years of use it would see a failure rate of approximately 5 - 15% depending on usage model. Remember this problem isnít a functional issue but rather one of those nasty statistical issues, so by nature it should take time to show up in large numbers (at the same time there should still be some very isolated incidents of failure early on).
Intel has already halted production of its 6-series chipsets and will begin shipping fixed versions of the chipset in late February. You can expect motherboard shortages through March at least. Intel hopes to be able to meet demand by April.
Currently Intel says the best course of action is to contact its support team for information on replacement, although Iím guessing once the fixed chipsets are available weíll have replacement plans from all of the motherboard manufacturers.