The official entry list was published today (04-16-2004)
You can check it out here :
So far we have the following withdrawals / replacements :
Yevgeny Kafelnikov ("semi-retired") replaced by Alex Corretja
Rafael Nadal (foot) replaced by Alex Bogomolov Jr.
Paul-Henri Mathieu (wrist) replaced by Kristian Pless
Mardy Fish replaced by Greg Rusedski