  A review of the latest experimental results on charm particle lifetimes is
presented. The most significant update is that the D_s^+ lifetime is
conclusively larger than the D^0 lifetime and signifies that
W-exchange/W-annihilation contributions are large. Using new high statistics
data on $D^+\to K^+\pi^+\pi^-$ together with the D_s^+ lifetime and some
assumptions, one can phenomenologically extract the strength of the W-exchange
contribution in D^0 decays and of W-annihilation in D_s^+ decays. These are
larger than or at the limit of theoretical expectations using QCD-based
operator production expansion techniques.
