Unipolar Stepper Motor Controller

Hi all, I developed a stepper motor controller with 16f628 and 4 transistors. I wanna publish it here. but I want to know your requirements. Could you reply here please.

1) how many control inputs for circuit you want?
2) how many speed?
3) voltage range you want?

Im waiting for replies. and then I will publish the circuit here.
at the moment circuit is for one unipolar-stepper, and controls as follows;

3 control inputs; 1:run-stop,1:speed(two speeds),1 direction(forward-reverse), and circuit is for 30V max.

Thank you very much for your help.

Here is what I have, or still want more or less.

Opto isolated, Pic driven, 5 unipolar stepper motor driver with PWM and microstepping options, 5 amps per channel, 30vdc, with self contained power supply.
Also room for feedback(encoder), to garantee step thru.
Visual read out on 7 segment Led's to confirm position on all motors.

Is that enough??

Good luck.

of course possible but looks so commercial...