I need to sync umbraco members with a MailChimp account.  The bit I am struggling with is the following events and knowing when to create/update/delete an email in MailChimp.

If I am in the Ubraco admin section and I create a user the event AfterNew is fired followed by BeforeSave then AfterSave.  I was going to put a flag in to the AfterNew to say that the member is a new member and add them to MailChimp ain AfterSave.

When the Member is being edited in Umbraco I need to know what the old/new email addresses are for syncing purposes.  What is the best practice for going about this?  BeforeSave sender already has the updated email and when I do a Member.GetMemberFromLoginName the member email is already updated, any help would be great.

   public class UmbracoMembershipIntegration :  ApplicationBase
    {
        public UmbracoMembershipIntegration()
        {
            Member.BeforeSave += new Member.SaveEventHandler(Member_BeforeSave);
            Member.AfterSave += new Member.SaveEventHandler(Member_AfterSave);
            Member.AfterDelete += new Member.DeleteEventHandler(Member_AfterDelete);
            Member.BeforeDelete += new Member.DeleteEventHandler(Member_BeforeDelete);
        }

        void Member_BeforeDelete(Member sender, DeleteEventArgs e)
        {
            Member member = sender;
        }

        void Member_BeforeSave(Member sender, SaveEventArgs e)
        {
            Member member = sender;
        }

        void Member_AfterDelete(Member sender, DeleteEventArgs e)
        {
            Member member = sender;
        }

        public void Member_AfterSave(Member sender, umbraco.cms.businesslogic.SaveEventArgs e)
        {
            Member member = sender;
        }
    }