I would like to set a "trending" Topic widget that will display the the 3 or 5 trending topics in the activity wall. Something like Twitter does. For example, I can ask people to include hashtags #something when they write a status load a photo or an event ... then we get the widget to display the top 10 most trending topics. Additionally, we would add a search widget so that users can do searches for specific hash tags.
Has anyone develop something like this? Any suggestions are welcome!