Places where I have found IV therapy classes: MEDTEXX.COM, Local voc/tech center, Community Colleges. After you do the home study, MedTexx has a "local" hands on workshop and online exam, I think it's 48 hours, - all expensive but could work. My local tech center has the class scheduled for Jan. 2008, if the number registered for it holds. The nearest Community College has the 40 hour class on campus, so I would have to travel daily or stay there during that week.
Some hospitals have the course for their employees. A nursing home I worked at hired a contractor to teach us a non state certified course so it's LPN's could do IV push meds and start IV's in that facility, I never had to start an IV.