I think that the "missing part" is the ... flash file. As I know, the official E60 update "kit" (for using in service centers) was released only yesterday, while the online flash for E60 was posted on September 11, two days earlyer. So I suggest to wait a couple of days for E70 also...
If you find yourself in strife after using the NSU to update your E70, please get in contact with an authorised Nokia Engineer. They will be able repair your phone, you can find the nearest one to you on www.nokia.com/repair
However, if you have been into a Nokia Engineer and have been unable to get it repaired, please call your local contact centre for assistance. You can find details for this on www.nokia.com/support