That's exactly what I was looking for. I also had this same scenario to work through. Clicking on the bar area of the bar chart just wasn't enough. Once the users noticed the charts were clickable, they were frustrated that the text wasn't clickable.
I almost switched to jqPlot, but now I can just add this to my existing Telerik charts. I didn't want to miss the nice downloadable images and better printing that Telerik gives me. Now I don't have to.
In order for the x-axis label to follow the same action in the code behind click event for the bar, I added the following code. I also change the tooltip text a little. So now my bar and it's label call a code behind method to display a trending chart for the aggregate.
sender, EventArgs e)
+ RadChart1.UniqueID +
+ (axisItem.Value - 1).ToString() +
axisItem.ActiveRegion.Tooltip = axisItem.TextBlock.Text.Trim();