I'd like to see more flexibility in entering recurring date events. In all three instances where I am/will be using it, there are occassions to enter events that happen on the XX weekday of the month (Example - 1st Saturday each month). I can't get it to let me do that, and have to hand enter the event each time.
Integration would be great, too, from a news portal viewpoint. For instance if you're writing an article that has multiple events listed in it, being able to add those events to the calendar without finishing the article THEN going to the JCal component and same way on the JCal end. You're entering an event that inspires an article.
All things considered, though, this is a good extension for just about any application
The next version will offer, simply put, the most extensive set of recurring event options, as well as recurring event exceptions. We have been using it on the development site for over a month...it rocks :)