I'd like to be able to choose a length of time for a category, instead of a fixed number of episodes. I have a category with a mixture of interesting content, but the lengths of episodes vary greatly (some less than a minute, some more than an hour). Instead of playing the oldest, say, 3 episodes, I'd like to tell it to queue episodes from that category until there are at least 10 minutes of content, regardless of the actual number of episodes.