I found some great tutorials online for rooting hibiscus plants. I've been wanting to do this for awhile, so I just went ahead and did it. For anyone looking to do this, I used these two sites: Rooting Tropical Hibiscus and Hibiscus 101.
I did three varieties. I have 6 different varieties in my garden, but I chose to do the three hardiest. In six to eight weeks I should know if they took. I don't have anywhere left to plant hibiscus, so I may have to give them away!