How long for pre-registration to be confirmed?

[luckydonut]

I registered using wire/fax for Event 37 $1500 NLHE over 2 weeks ago now but haven't had a confirmation yet (other than the bank confirming that my money has gone). How long should it take to hear back from the Rio? I am in the UK so if the confirmation is coming by regular mail then I can understand a delay, but I thought it might come by email - any experiences?