We don't have anything that will walk you through JMVC + php / mysql.
However, if you can figure out how to create a REST service with php + mysql ( maybe with: http://net.tutsplus.com/tutorials/other/a-beginners-introduction-to-http-and-rest/ )
Throwing CanJS on top of it will be easy. That tutorial shows how to create a clients serivce. You would create a model to connect to it like:
Client = can.Model.extend({
id: "name",
findAll: "/clients/"
findOne: "/clients/{name}",
destroy: "/clients/{id}",
},{})
Client.findAll({}, function(clients){
})
Actually, that tutorial uses PUT to create an item when it should be using POST.
Anyway, if you can create a rest service, let us know what it looks like and we will show you how to create a model that connects to it.