EDITED: OK, so the pre-auth has been removed a week later. Just in case anyone was wondering how long it takes.
My credit card has been charged with the pre-auth from CC Now, however afterwards I received an email from them stating my CVV was incorrect and to choose another payment method. I'm positive I put in the correct CVV.. I think I am just going to use paypal instead so I don't have to deal with the hastle. Does anyone know how long it takes the pre-auth to be credited back?