Do I have to leave US?

I have 14 months left on my 6 year H1B, which expires April 2007.

I am wondering if it is still possible to have H1B extened for 7th year,
if I change a job now?

I am about to get an offer. They do H1B transfer and green card.
But I am not sure if I still have enough time.

I do not have pending LC, and I have not been out of US.

If I have to leave, can I work in other country(like Canada) and work for a US company remotely?

Thanks for any input.