In the olden days (before iPhones), if you attended a photography workshop, you'd learn some good techniques and write down all the stuff you needed to achieve them. By the time you got home and bought the equipment, you probably didn't really remember how to use it. Now, things are different.
If you go to an iPhone workshop, you can literally get the equipment (i.e. Apps) right then and there. You can experiment with it as the instructor is speaking. And the best part is that the "equipment" you'll get is either free or very inexpensive.
iPhone workshops are popping up all over. Look for one in your area, or better yet, create your own iPhone Photography Workshop. Hmmm...that's a good idea. I think I'll try it myself. :)