NO positive leap second will be introduced at the end of June 2005. The difference between Coordinated Universal Time UTC and the International Atomic Time TAI is :
from 1999 January 1, 0h UTC, until further notice : UTC-TAI = -32 s
Read the entire announcement ("Bulletin C", issue 29).
Over six years now without a leap second: I believe that's one of the longest such periods in recent history.