character/handwriting recognition??

Hey folks, a while back (before i got my iphone), i saw a video on youtube of a brand new opened iphone 3g and the owner showed that he could write in various asian languages graffiti style and have the iphone recognize it. Some call it handwriting recognition, others, graffiti recognition. However, i can't seem to get mine to do this with Korean. However, i SAW the person on the youtube video do this in KOREAN, not chinese. Does anyone know how to get the iphone 3g to be able to recognize korean handwriting? Do i need to download a new application? I've heard of diotek/diopen, but haven't been able to find any download for it. Thanks in advance!!