How to get checkbox selected values in mvc3 form?

This seems like a good candidate for editor templates. As always we start by designing a view model:

public class MyViewModel
{
    public string Name { get; set; }
    [DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}", ApplyFormatInEditMode = true)]
    public DateTime? DateOfBirth { get; set; }
    public string Place { get; set; }
    public IEnumerable<InterestViewModel> Interests { get; set; }
}

public class InterestViewModel
{
    public int Id { get; set; }
    public string InterestLabel { get; set; }
    public bool IsSelected { get; set; }
}

then a controller:

public class HomeController : Controller
{
    public ActionResult Index()
    {
        var model = new MyViewModel
        {
            Name = "john",
            DateOfBirth = new DateTime(1990, 1, 1),
            Place = "Spain",
            Interests = new[]
            {
                new InterestViewModel { Id = 1, InterestLabel = "cinema" },
                new InterestViewModel { Id = 2, InterestLabel = "sport" },
                new InterestViewModel { Id = 3, InterestLabel = "books" },
            }
        };
        return View(model);
    }

    [HttpPost]
    public ActionResult Index(MyViewModel model)
    {
        // TODO: process the results here, the view model will be
        // correctly bound
        ....
    }
}

then a view (~/Views/Home/Index.cshtml)

@model MyViewModel

@using (Html.BeginForm())
{
    <div>
        @Html.LabelFor(x => x.Name)
        @Html.EditorFor(x => x.Name)
    </div>
    <div>
        @Html.LabelFor(x => x.DateOfBirth)
        @Html.EditorFor(x => x.DateOfBirth)
    </div>
    <div>
        @Html.LabelFor(x => x.Place)
        @Html.EditorFor(x => x.Place)
    </div>
    <h2>Interests</h2>
    @Html.EditorFor(x => x.Interests)

    <button type="submit">OK</button>
}

and a corresponding editor template which will be rendered for each element of the Interests collection (~/Views/Home/EditorTemplates/InterestViewModel.cshtml):

@model InterestViewModel

@Html.LabelFor(x => x.IsSelected, Model.InterestLabel)
@Html.CheckBoxFor(x => x.IsSelected)
@Html.HiddenFor(x => x.Id)
@Html.HiddenFor(x => x.InterestLabel)