IMHO

Set to 11 different clues across 11 published puzzles, most often “Letters of faux modesty” — The New York Times, Sunday, 21 November 2010.

4 letters

Every clue on record, most used first

Letters of faux modestyonce
The New York Times — Sunday, 21 November 2010
Chat room openeronce
The New York Times — Thursday, 22 April 2010
Blogger's prefaceonce
The New York Times — Sunday, 31 January 2010
Preface onlineonce
The New York Times — Sunday, 30 August 2009
"If you ask me," in a chat roomonce
The New York Times — Sunday, 9 November 2008
Internet initialismonce
The New York Times — Sunday, 26 October 2008
"If you ask me," onlineonce
The New York Times — Sunday, 14 September 2008
Chat room shorthand for "Here's what I think"once
The New York Times — Tuesday, 8 April 2008
Online initialismonce
The New York Times — Sunday, 14 January 2007
Chat room initialismonce
The New York Times — Sunday, 2 April 2006
"It seems to me," in computereseonce
The New York Times — Sunday, 29 August 2004