Question for the FL

Firstly; Can someone clarify what 'PWNED!' means? I think I've got a general idea from seeing it used for various occasions. And to that end I'll hazard this sentence: Alex just got pwned by a seagull. Seriously, it was funny. This gull eats their fries, gets clapped at, gives them the 'Oh, Purleeease' look, and eats the cardboard carton they throw at him - the result being that these grown men grow frightened and move indoors. Hah.

Secondly, can someone tell me what happened in the Desperate Housewives season two finale? We saw the first part on Wednesday night but missed the second. In particular, what happened to Gabrielle and Carlos?