Creating an online course is challenging. You must consider what types of learners you may get. You may not see any students face to face, so having very detailed course expectations is important. When teaching a online course you must try to know all the ins and outs of the application. Because questions will arise about the new application. Its probably a good idea to have students look over the frequently asked questions section before they ask their questions. In my past experience will online course we were split into groups for the quarter and it was our responsibility to logon and complete assignments on time. We would only sign in once a week for instructor interaction. The instructor could see if and who signed on for group sessions. I experienced having to complete assignments with only 3 members of a 6 member group, communication really is the key in an online environment. With anything new it will have kinks in the beginning but they can be ironed out over time.
In the online environment writing activities are best. Groups or individuals can always create and submit written projects from anywhere. You could also have groups create and present a power point presentation about some course information. I like blogging as well it keeps everybody communicating by sharing your opinions and ideas.