One good thing have been adopted by 21Cineplex websites. They provide RSS feed for each theater in every city. For example, for Yogyakarta, you can see the feed here. Now, it's getting simpler to view the movies being shown without having to visit the website.
Too bad they don't give which studio and what time the movies are played. So far, they only gave picture, a brief description, genre, and a link to look for the schedule.
I wish they read this post and update their feed information in the future