Take it a step further...
Type in the text that you want to be vocalized, choose the voice you want to use, and have this little toy call your buddy. Oh, worried about the caller ID blowing the prank? Well hey! It can fix that little detail.
Fill in the fields, and voila! You're sending the message of your choice, in the voice of your choice, to the phone number of your choice, apparently from the person and number of your choosing.
You must use this power only for good. Promise me.
(Extra points for recognizing my sample phone numbers, and JPG's guesses don't count.)