var observable = kendo.observable({
    people: [
        { name: "John Doe" },
        { name: "Jane Doe" },
        { name: "Jimmy Doe" }
    ],
    products: [
        { name: "Table" },
        { name: "Chair" },
        { name: "Tomato" }
    ],
    animals: [
        { name: "Dog" },
        { name: "Cat" },
        { name: "Monkey" }
    ]
});

$.ajax("mysite/getstuff").done(
    function(data){
       var observable = kendo.observable(data);
    });

{
    people: [array of people],
    products: [array of products],
    animals: [array pf animals] //etc
}