sto provando con connectWith, e sembra funzionare... ma ha uno strano comportamento: i blocchi vengono disposti in maniera apparentemente casuale :master:

Codice PHP:
<html>
<head>
    <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
    <script type="text/javascript" src="http://dev.jquery.com/view/tags/ui/1.5b2/ui.base.js"></script>
    <script type="text/javascript" src="http://dev.jquery.com/view/tags/ui/1.5b2/ui.sortable.js"></script>
    <script type="text/javascript" src="http://dev.jquery.com/view/tags/ui/1.5b2/ui.draggable.js"></script>
    
    <script type='text/javascript'>
        $(document).ready(function(){
            $('#elenco1 .block').draggable({
                cursor: 'move',
                connectToSortable: '#target'
            });

            $('#target').sortable({
                cursor: 'move',
                connectWith: ['#elenco1']
            });
        }); 
    </script>
    <style type='text/css'>
        #elenco1 {
            float: left;
            display: block;
            height: 200px;
            width: 100px;
            background-color: #999;
            }
        .block {
            display: block;
            height: 20px;
            width: 30px;
            margin: 5px;
            }
        #target {
            display: block;
            vertical-align: top;
            text-align: left;
            margin-left: 150px;
            height: 200px;
            width: 100px;
            background-color: #bdf;
            }
    </style>
</head>
<body>
<div id='elenco1'>
    <div class='block' style='background-color:#aaa;'></div>
    <div class='block' style='background-color:#ccc;'></div>
    <div class='block' style='background-color:#eee;'></div>
</div>
<div id='target'></div>

</body>
</html>