I too would like to see Telerik release a Org Chart control.
I also am currently using the smartwebcontrol chart. I searched the web constantly before I "settled" on the smart web control. I use their chart in conjuction with the RadGrid and when the chart posts back I update the rad grid with new data. It is an ugly mixture and would much rather have a telerik org chart that would mesh much better with the other telerik controls I use.
I'm sure any org chart control Telerik released would control the market for such controls.
*If you read this post and would also like an org chart control post a response and let's get some motivation behind a new control!*