Here are some more websites:
http://www.jiggmin.com/
http://www.newgrounds.com/
http://armorgames.com/
http://www.indieflasharcade.com/
http://thorgaming.com/
http://www.dailyhaha.com/
http://www.pogo.com/home/home.do
http://jayisgames.com/
http://mousebreaker.com/
http://beta.www.mousebreaker.com/
http://www.kongregate.com/