I'm iffy about Lando dying, but I'm all for Han dying. I know it completely ruins the EU, and I do enjoy the Thrawn trilogy, but as it is, in ROTJ you never really *feel* like the characters are in danger. Killing Han would really help that. Lando, on the other hand, would die at the very end, when it doesn't matter anymore, though sacrificing his life to end the Empire after betraying his friends to them would be rather poetic.
On second thought, go for it! Kill Lando too!
-edit-
Right, this is the ESB:R thread ... sorry ... back on topic!