Moving from AR to CA... LPN diploma question

I am planning on starting an LPN program here in Arkansas this July and it is a one year diploma program in Practical Nursing. The diploma program is at a local hospital. My husband thinks his career will take us back to California (our home originally before getting in the Air Force) by fall of 2009. I was curious as to what is the procedure for an LPN who received her diploma in Arkansas to be able to work in California. Is it a difficult process? Thank you so much for any help you can give me, because I'm not sure where to look for this information.