Eagle Tree Systems Micro Recorder
 

Check it out:
http://www.eagletreesystems.com/MicroPower/micro.htm

I ordered mine at the end of December, and got it today! Unfortunately I can't do any real testing since both of my servos have fried (faulty regulator that later went up in smoke). BUT, I was able to do some bench testing where I revved the throttle with the only load being the drivetrain and tires. So far I tested out gradual throttle input, as well as immediate throttle input. In my Rustler on 3s Lipo with Feigao 12s motor, and HPI Yokohoma tires on 20/90 gearing, the motor hit up to 34,000 RPM, and at one point made a spike to 23amps/10.1v/235watts. That spike was without a load! I can't wait until I get new servos so I can do some real testing!

http://img.photobucket.com/albums/v1...erRevving-.jpg

In this graph you can see the gradual acceleration and the almost instantaneous full-throttle acceleration. Sorry that the file is large (56k'ers).

EDIT:
From the RPM and battery voltage of this (relatively) unloaded setup, the kv of my motor came out to be 2982, and Feigao rates it at 3058.

I have the bigger version that cost 150$, man, i wish I had this one tho, it looks alot smaller, and still capable of doing what i need it today, the big one, i have no room for.

Sell it and buy this one :). It really is a great unit, and I wish it had come out sooner!