In reply to steve taylor: How many do you want? I work for the local "Leccy board" as a linesman and we struggle to get rid of them. We end up taking most of them back to the depot. Farmers have some, but then never use them, prefering to leave them where they lay, slowly rotting.
I used to burn them in our old house, even lit the fire with a Fire lighter and just pole bits. Never had a problem. One positive, not much ash in the grate. I'd say go for it.
One word of caution though. Some old poles have a silver foil wrapped around the bottom foot or so. These are "Cobrad" poles, done in the 60's Arsenic was injected into them to help stop them rotting. Don't burn this part of the pole.