SELECT COUNT(*), AUTHOR
  FROM http://lists.w3.org/Archives/Public/public-html/2009Feb/
  WHERE SUBJECT like '%namespace%'
  GROUP BY AUTHOR DESC;

21 Larry Masinter
17 Robert J Burns
14 Maciej Stachowiak
13 Ian Hickson
11 Sam Ruby
 8 Boris Zbarsky
 7 Robin Berjon
 7 Julian Reschke
 5 Philip TAYLOR
 4 Rob Sayre
 4 Jonas Sicking
 3 Lachlan Hunt
 3 Karl Dubost
 3 Dan Connolly
 2 Smylers
 2 Edward O'Connor
 2 Dean Edridge
 1 Leif Halvard Silli
 1 L. David Baron
 1 Charles McCathieNevile
 1 Anne van Kesteren