On Thu, 7 Aug
2003, Fred N. van Kempen wrote:
  On Thu, 7 Aug 2003, Vintage Computer Festival
wrote:
 > The proper usage is to speak of "myriad OT threads" (as 
 in
"many OT
  Wrong, it's "a myriad *of*
<something>" , defined as "a 
 great number
  of things", "many things" and so
on. 
 As others have already pointed out, both uses are correct
 (which was news to me since I was taught only the noun form).
 
 Most dictionaries reflect current "common" usage.  That which was once
 wrong becomes "correct" if enough people who are wrong persist in being
 so.  Some dictionaries adopt common convention more quickly than others.
 If you want to win a pronunciation debate based on "classic" usage, grab
 American Heritage.  If you are arguing for "popular" usage, go for
 Websters.