Because of all the options available, you're best bet is to call Kodak or a local camera store to see what they suggest. I don't get the impression from your post that you're looking for a simple slave flash but, just in case, here is some information.
http://www.digicamhelp.com/digital-camera-slave-flash/index.htmThe Vivitar DF200 Digital Flash is feature there. It is a universal flash designed for any digital camera with an integral flash, which acts as a slave to your built-in camera flash. It has a learning-mode that profiles your cameras existing flash.
If you're looking for more sophisticate equipment and flash sets, these links give you some idea of what's available:
http://www.srelectronics.com/http://www.skaeser.com/continuous_lt_kits_list.htmlhttp://www.smithvictor.com/