ok so they didn't add the functionality for the sql dependencies and notifications into the enterprise library, so this is what i came up with so far as a wrapper:

public class SqlExpiration : Microsoft.Practices.EnterpriseLibrary.Caching.ICacheItemExpiration, IDisposable
        {
            private SqlCacheDependency dp = null;
            private string database = string.Empty;
            private string table = string.Empty;
            public SqlExpiration(string database, string table)
            {
                this.table = table;
                this.database = database;


                dp = new SqlCacheDependency(database, table);
            }


            #region ICacheItemExpiration Members


            public bool HasExpired()
            {
                return dp.HasChanged;
            }


            public void Initialize(Microsoft.Practices.EnterpriseLibrary.Caching.CacheItem owningCacheItem)
            {
            }


            public void Notify()
            {
            }


            #endregion


            #region IDisposable Members


            public void Dispose()
            {
                if (dp != null)
                {
                    dp.Dispose();
                }
            }


            #endregion
        }

 am i missing anything? it seems to work fine i just have no idea