I see allowing the user to hit the "Tab" key will navigate through tabs, but I do not know how to implement this. I have the latest release of Telerik. Thanks.
I prepared a sample project for you which demonstrates how you can implement tabulation through the tabs of a RadTabStrip. You have two tabulation options - tab by tab index and tab by a custom condition using the Tag property.
Basically, you need to inherit RadTabStrip and override the ProcessCmdKey method.
I hope that this will help you in your further development. If you have additional questions, feel free to contact me.