DisableEventFiring is obsolete in SharePoint 2010

You can check this in msdn. However DisableEventFiring()/EnableEventFiring() still works as per Reflector.
Recommended way now is to use new property EventFiringEnabled. This gives us an option to check current status and save it. I found a great post from Adrian Henke and modified his code using this new feature.

    public class DisabledItemEventsScope : SPItemEventReceiver, IDisposable

    {

        private bool eventFiringEnabledStatus;

        public DisabledItemEventsScope()

        {

            eventFiringEnabledStatus = base.EventFiringEnabled;

            base.EventFiringEnabled = false;

        }

        #region IDisposable Members

        public void Dispose()

        {

            base.EventFiringEnabled = eventFiringEnabledStatus;

        }

        #endregion

    }



The class DisabledItemEventsScope disable/enable event firing for the current thread 

and could be used in that manner at any place  

including code behind for the page or web part   

item["Title"]="New Title";

using (new DisabledItemEventsScope())

{

   item.Update(); // will NOT fire events

}

 BTW: There are couple useful SPList extensions to manage SPListItemEventReceiver collection

public static void AddEventReceivers(this SPList list,Type erClassType,params SPEventReceiverType[] erTypes)

{

   foreach (SPEventReceiverType erType in erTypes)

   {

      list.EventReceivers.Add(erType, erClassType.Assembly.FullName, erClassType.FullName);

   }

} 

// Sample:

// list.RemoveEventReceivers(typeof(TestProject.ListItemEventReceivers.TestReceiver));

public static void RemoveEventReceivers(this SPList list, Type erClassType, params SPEventReceiverType[] erTypes)

{

  List<SPEventReceiverDefinition> receivers = new List<SPEventReceiverDefinition>();

   for (int i = 0; i < list.EventReceivers.Count; ++i)

     {

       SPEventReceiverDefinition r = list.EventReceivers[i];

       if (r.Class.Equals(erClassType.FullName) && (erTypes.Length==0 || erTypes.Contains(r.Type)))

                    receivers.Add(r);

     }

     foreach (SPEventReceiverDefinition r in receivers)

     {

        r.Delete();

     }

}