Ok, read up a bit more and started calling Polish aviation folks.
The dead are the following: Kaczysnki (president), his wife, Aleksander Szczyglo (Head of National Security Bureau), Jerzy Szmajdzinski (deputy parliament speaker), Andrzej Kremer (Deputy Foreign Minister), Gen. Franciszek Gagor (army chief of staff), Slawomir Skrzypek (National Bank of Poland), Janusz Kurtyka — (National Remembrance Institute, national anti-communist organization), some lawmakers, aids, priests, etc.
It crashed in Smolensk, Russia. Cause is currently thought to be fog on the landing approach and the pilot error. The last overhaul was done by Aviakor in Samara, Russia in December.
Of all the ironies, the plane was on the way to the Katyn massacre site. Putin has gone to the crash site and is "heading" the investigation in person. Considering that a huge chunk of the Polish leadership just died in Russia, on the way to a Russian atrocity site, this is not exactly surprising.