afaik

from Jargon File (4.4.4, 14 Aug 2003)

AFAIK
 //, n.

   [Usenet; common] Abbrev. for "As Far As I Know". There is a variant
   AFAICT "As Far As I Can Tell"; where AFAIK suggests that the writer
   knows his knowledge is limited, AFAICT suggests that he feels his
   knowledge is as complete as anybody else's buit that the best
   available knowledge does not support firm conclusions.

from The Free On-line Dictionary of Computing (8 July 2008)

AFAIK

   <chat> as far as I know.

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

AFAIK
       As Far As I Know (slang, Usenet, IRC)