Ah... funny story about the trending questions. When I initially set it up, I thought it worked like our previous top ten... that it looked at the last week and tabulated comments and populated it with the most popular from the last 7 days. When I imported all the data, I found out it was pulling since the dawn of time and I couldn't get it to look at just the last week. Worse yet, some of our most popular discussions got sent to the nether on import, so half the links were dead.
At any rate, for the sake of having not dead links there, I switched it to show the most recent questions. The dev is still working on making those links undead and then one of the later projects is to create a new tracker that gives us more relevant results. So for now, all you have to do is ask something and you make the trending list.