The Futaba 4 PLS T-FHSS Computer Radio System offers free telemetry and lots more.  It gathers 4 key types of data, has 3 transmission modes, digital trims, a trigger adjustment and we could go on and on.  But you can see for yourself simply by watching the video below.  You really will want to check out this one:

[youtube]http://www.youtube.com/watch?v=cbSxsISzjvg[/youtube]