It is your duty to keep Andy's list as 
  complete/accurate as possible.

  These sites will, in general broadcast home matches
  (for which they have the rights). But they try to
  acquire the rights for away matches too.

  http://www.cricket.org
  Cricinfo occassionally  get the internet broadcast rights
  for broadcasters withou a net presence. eg  Sri Lanka, etc.

  http://www.total-cricket.com
  If Wordtel is doing the TV production, chances are
  good they will broadcast on the net as well.

  Over to Andy:

  Australia
  http://www.abc.net.au/cricket

  England
  http://www.lords.org
  The bbc has just signed a 5 year agreement.

  India
  http://www.dd.now.com
  Century cyberworks has an agreement with doordarshan
  for 4 years to telecast home matches.

  Pakistan
  http://www.radio.gov.pk
  Pakistani state radio they switch between urdu and 
  english. The station's server has limited capacity. So
  get in early! ODIs only.

  The direct link is
  http://210.56.8.32:7070/ramgen/encoder/radio.rm
  Save the link directly into your realplayer and then 
  continuing to try to get in.

  South Africa
  http://www.livesport.co.za/cricket

  New Zealand
  Radio sport has refused to let anyone broadcast 
  or transmit the matches over the web or own  
  shortwave unless they pay a fee.

  Sri Lanka
  Nothing known yet.

  West Indies
  Gireesh Bhat:
  http://surfreal1.caribsurf.com/cbc-live.asx

  http://www.cananews.com/cricketplus.htm
  If this doesn't work, navigate from
  http://www.cananews.com/ 
 
  Like livesport, the url of the stream 
  is only put up before the match starts.

  Zimbabwe
  http://www.livesport.co.za/cricket has carried zimbabwean 
  matches in zimbabwe and maybe they will continue to do so.

  Huge list of alternate WI sites available but not posted! 
  Email corrections and additions either to me, andy
  or post on rec.sport.cricket