THEMES:
http://www.mpbus.net/(S(624-Nokia_N73-6z7-4-15))/Themes/download-0-1.html
GAMES:
http://www.mpbus.net/(S(624-Nokia_N73-6z7-4-15))/Games/download-0-1.html
My phone is N73. I usually get free games and themes at these links, and I hope people who had N73 will like them, and share your sites.