At the moment it grabs the current trending topics from Twitter every several minutes while searching every few minutes for new tweets that mention twitpic.com as well as the topic. Toppics, get it. 🙂
Version 0.0 is very basic, but very fun. For example, I know when a football game starts because all of a sudden two team names pop up and I have jersey pictures from both sides. I’ve been able to determine that tweeps really like the Christmas tree at the Four Seasons by watching that category for the last day.
The display is only within the last 24 hours, and that does two things. One – it keeps the pictures relevant. One “Monday Night” trending topic is different from another. Two – it can keep picture counts low. I’m learning quickly that some trends just don’t generate pictures. I hope to add some more features in as well soon, possibly refrain from creating a topic page until it has content to display.
The next goal is to add content. It’d be nice to grab visuals from other sources than Twitpic, especially for the topics that don’t generate a lot of traffic. And, while visuals are great, if I can add some context with text, that would be ideal.
All in all, it’s another playground. Feel free to play.