Taken from a post on Hellenic Recons. Here's the account number to which you could send any donations. Don't add the quotes of course. You could also send money from abroad to this number.
"IBAN : GR 6701200010 000000086181428
SWIFT CODE EMPOGRAAXXX
the account is called ELLINIKO DIMOSION LOGARIASMOS AROGIS PYROPLYKTON
that means Greek Public Acount for helping the victims of fire"