Sergey Amelin (the author of many pictures and shemes posted in Smolensk forum) today posted crash site satelite picture with marked majour plane parts.
As hi is writing - initial version, some innacuracies are possible.
Currently the tail part (red with ? mark) is indentified as laying in another place.
http://s48.radikal.ru/i120/1004/3a/5b58462f20d6.jpg
Corrected sheme is here:
http://s41.radikal.ru/i091/1004/44/5dcbe16522b5.jpg