Canada's government is tweeting the G8 and G20, posting photos and such. There's also live video and news from the summit here.
Read about the G8 Maternal and Child Health initiative here.
9 am eastern (all times eastern), Obama takes part in the G8 working session.
11:45 am, Obama leaves Muskoka for Toronto.
12:35 pm, Obama gets to Toronto.
2:15 pm, Obama speaks with Prime Minister of UK David Cameron.
3:15 pm, Obama meets with President Lee of South Korea.
4:15 pm, Obama meets with China's President Hu