I have been asking about this on the irc and they said it is not possible right now (would love to be wrong)
I would like to be able to hold down ctrl like in maya or another key to slow down slider interaction when moving it with the mouse. Right now it goes from 0 to 4648768 if I move the mouse half an inch and it is painful to work with when you are fine tuning stuff.
So you know, you can Click on the Field like you are going to hold down the mouse button and move the mouse to scroll, but instead, after you click, release the mouse button and use the scroll wheel. it goes up or down by minuscule amounts.
Or, if you click and hold, you can press the up or down arrow for minute movements.