How to set up a VisualForce page to edit multiple rows at the same time?

This code explains how to build a simple page that allows you to edit several records at the same time. The code builds this table:

You can edit any email, but only those marked with the checkbox will be saved on the database once the “Save” button is clicked, additionally there is a link on each row that will navigate to the edit page and fully edit the record. This is not a very good user interface, but allows me to demonstrate some techniques.

VisualForce Page:

<apex:page controller="MultiRow" >
    <apex:form >
        <apex:pageblock >
            <apex:pageBlockButtons >
                <apex:commandButton value="Save" action="{!Save}" />
            </apex:pageBlockButtons>
            <apex:pageBlockSection columns="1">
                <apex:dataTable value="{!Contacts}" var="c" border="1" rowClasses="odd,even" styleClass="tableClass" cellpadding="3">
                    <apex:column >
                        <apex:facet name="header">Actions</apex:facet>
                        <apex:inputCheckbox value="{!c.Checked}"/>
                        <apex:commandLink value="Full Edit" action="{!URLFOR($action.Contact.Edit, c.ID)}" target="_blank" />
                    </apex:column>
                    <apex:column >
                        <apex:facet name="header">Name</apex:facet>
                        <apex:outputText value="{!c.Name}"/>
                    </apex:column>
                    <apex:column >
                        <apex:facet name="header">Email</apex:facet>
                        <apex:inputText value="{!c.Email}" />
                    </apex:column>
                </apex:dataTable>
            </apex:pageBlockSection>
        </apex:pageblock>
    </apex:form>
</apex:page>

Controller:

public class MultiRow {
    public List<multiRowContact> Contacts { get; set; }

    public MultiRow() {
        LoadData();        
    }

    public PageReference Save() {
        for (multiRowContact MRC : Contacts) {
            MRC.Save();
        }
        LoadData();
        return null;
    }
    private void LoadData() {
        Contacts = new List<multiRowContact>();
        for (List<Contact> cs : [SELECT c.ID, c.Name, c.Email FROM Contact c WHERE c.AccountID = '0018000000OdcOt']) {
            for (Contact c : cs) {
                multiRowContact MRC = new multiRowContact();
                MRC.ID = c.ID;
                MRC.Checked = false;
                MRC.Name = c.Name;
                MRC.Email = c.Email;
                Contacts.add(MRC);
            }
        }
    }

    private class multiRowContact {
        public String ID { get; set; }
        public String Name { get; set; }
        public String Email { get; set; }
        public Boolean Checked { get; set; }
        public void Save() {
            if (Checked) {
                System.debug('Saving...ID: ' + ID);
                Contact c = [SELECT c.Email FROM Contact c WHERE c.ID = :ID LIMIT 1];
                c.Email = Email;
                update c;
            }
        }
    }
}