i brought the book from micro center and i want to know if the following will work in the sdk 3.0?

Hack 12.20 - Infrared Remote

Hack 12.21 - Serial Modem

Hack 12.22 - Keyboard

i am mostly interested in the serial modem and i really want to
do the iphone develoopment with some serial access.

best regards,

thomas yuen