I got my replacement today, it is a N800 (I live in the US). It took a total of about 1 & 1/2 month for Nokia to send me a replacement and I have already gotten a used 770 from ebay after 2 weeks of withdrawal symptoms. I haven't tested too much of the power of my N800 yet. But I am glad I have one now before they are sold out everywhere. Now I have a 770 and a N800, I should be able to test all the new programs for NIT out there , except those only for N810.
So if you have a WSOD on 770, better send it back to Nokia to get a replacement if it is still under warranty.