Railscasts Android app

In fact I have included the option to "Mark as watched". Just lonk click
the screencasts on the list and select the option on the contextual menu
Perhaps it's not clear enough.. I'll work on that!

Perhaps you could do it as in Gmail app? Tap the icon to mark an entry and have an icon in the top bar to toggle status? This would make marking 200 episodes as seen much easier!