I know this response may be late in coming to you , but I have just run across your question. My group did a paper on your specific question about educational opportunities offered on the internet for nurses when I was in graduate school. What the group did was pitch in and actually take a CE course on the internet and then we evaluated it, as to ease in taking the course, time it took, graphics, and cost. It worked very well, and what I can tell you is that there are some very good courses online for nurses, there are also now university distance courses online for nurses that are very good. It is just a matter of logging on to see exactly what they offer. I belong to the American Association of Critical Care Nurses and they offer some very good CE online courses, as well as Medscape-Nursing.
Hope this helps