(keitai-l) Camera phone : How much functionality is exposed via an API?

Hello,

I have not had the chance to play with a camere equipped handset so I've 
got lots of questions for those of you who have. For starters, what 
exactly can I do as a programmer with a camera phone? Is there a rich API 
that let's me talk to the camera subsytem from  a midlet ? From point to 
shoot to send where and when can I have callbacks to my own code to do 
something interesting?

Thanks,
Doug