It looks like those who waited until late to order the mail-away white-armor Boba Fett figure have to wait a little longer to get their figures, around July 20th, because of heavy interest. I just got the following note from Hasbro in the mail. It isn't terribly surprising as it's happened before with prior mail-away promo figures. Keep in mind that the new ship date is only 2 months away, but Hasbro also gives anybody who wants to cancel a phone number to do so.
Honestly though, don't cancel, it's not worth the $7 you already spent. Look for this fine Hasbro Star Wars collectible in your mail soon, and then your Boba Fett in the mail come July 20th.