I have created several playlists for myself and when I want to move classes around I have to delete and add again. It would be great if I could just move classes between the various playlists and even within one particular playlist. I love using the playlists to organize my workouts:)

To re-order classes in a playlist, find the playlist you want to edit and press the "Edit" button. You'll see a number to the left of each class. Chance that number to change the order of that video. For example, if you want to change the video that's currently #5 in your playlist to #1, change the 5 to a 1, and then press the save button at the bottom. Please let me know if this isn't clear or if you have more questions.

OK Ted thank you and what about moving a class out of playlist "a" and into playlist "b". Should I be doing copy and paste in that situation?

There's no way to move a class from one playlist to another that's nearly so simple. You'd need to remove it from one playlist and add it to the other one I'm afraid. We can keep this in mind for future code revisions.