Photos On Canvas

This is something I've been intrigued with for ages and wish I knew how I could do it at home - photos printed onto large scale canvas pieces. Anyone out there have any experience at doing this? CanvasonDemand.comdoes it and their prices seem to be comparable to others, but I still don't have extra money laying around to be able to order one. Being the crafty person that I am, I think I'd rather do it myself here at home too.