H-1B visa holder and Canadian work permit

[Prasha]

Hi,

I am an H-1B visa holder. My employer has an office in Canada as well. They are planning to send me to Canada in Nov'10 on Canadian work permit as my H-1B expires in Oct end.

I understand that after getting the work authorization letter from CIC, I need to get my work permit from the Immigration officer once I land in Canada.Regarding that I have the following queries:-

1) Assuming I reach Canada and get my work permit in Aug/Sep, can I go back to US and keep working there till October end (when my H-1B expires) and join the Canadian office in November.
2) Also, would it be possible for my wife to stay in Canada and find employment (with a spouse open work permit) when I am in the US.
3) And would it be possible for me to travel every week between the two countries, thus simultaneously holding both H-1B visa and Canadian temporary work permit.

Thank you for your time.