Hey Alex,

The following solution is going to depend on whether your mobile browser can initialize javascript that comes over from an AJAX call. Safari handles it fine, that is what I tested this with.

You can add your message to a BillBoard control and also add a snippet of Javascript that will send them back to the home screen:

EntreeListItemBillboard bb = g.AddListItem<EntreeListItemBillboard>();
bb.InnerHtml = "Item Created! You will be redirected shortly";
bb.InnerHtml += "<script type='text/javascript'>setTimeout(function(){window.location = '../';}, 4000);</script>";