codice:
<form action='./index.php?status=banforum' method='post' name="banforum">
<input type="hidden" name="scelta">
    <?
        while ($row=mysql_fetch_array($query, MYSQL_NUM)) {							
            if($row[1]=="1") {
            ?>
                <input type="checkbox" onclick="this.form.scelta.value=this.value;this.form.submit()" checked="checked" value="<?=$row[0]?>" name="bforum"/>									
            <?
            } else {									
            ?>
                <input type="checkbox" onclick="this.form.scelta.value=this.value;this.form.submit()" value="<?=$row[0]?>" name="bforum"/>																		
            <?									
            }
        }
    ?>	
    </form>
Ovviamente sul server dovrai prendere in considerazione solo il valore del campo "scelta"

ciao