>>P.S. I wonder if they could graft, say, tobacco or chillies instead ?
>
>https://www.google.com/#q=tomato+tobacco+graft
>Hrm... tomacco ( https://www.google.com/#q=tomacco )?
>
>https://www.google.com/#q=tomato+chili+graft

Well that answers that question. Should have googled it myself.......