In my experience, most Canadian businesses won't consider you without the correct visa. I haven't really heard of too many companies sponsoring someone.
Have you considered doing some contract work through oDesk or similar? If you establish some contacts with American / Canadian companies and prove your value, they may be more inclined to help you come over.
Have you considered doing some contract work through oDesk or similar? If you establish some contacts with American / Canadian companies and prove your value, they may be more inclined to help you come over.