I just got this back from Mt Gox Support
Hello,
Before 3:00 GMT on Friday June 24th you will receive an email from us advising that either
A) Your claim was successful and you can login to Mt.Gox once the site is up.
or,
B) We require more information to process and authorize your claim.
We appreciate your continued patience as we work to get everything back online.
Thanks,
MtGox.com Team
P.S Also posted this in this thread
http://forum.bitcoin.org/index.php?topic=21602.0