I often use my BBQ grill to burn paper and other stuff in, only to have to thouroughly clean it out before I can put, well, food on it again.

This seems like a really good do-it-yourself project that I would enjoy.

Just find a crappy old washing machine, rip out the stainless steel drum, add a stand, and voila, a nice waste burner and heater for the winter.

Stainless Steel Garden Incinerator – Patio Heater from recycled scrap.