Acceleration is pretty much the same as speed here, as I understand it. From the xset man page:
Code:
xset [mouse [accel_mult[/accel_div] [threshold]]] [mouse default]
The m option controls the mouse parameters; it may be
abbreviated to ’m’. The parameters for the mouse are
‘acceleration’ and ‘threshold’. The acceleration can be
specified as an integer, or as a simple fraction. The
mouse, or whatever pointer the machine is connected to, will
go ‘acceleration’ times as fast when it travels more than
‘threshold’ pixels in a short time. This way, the mouse can
be used for precise alignment when it is moved slowly, yet it
can be set to travel across the screen in a flick of the
wrist when desired. One or both parameters for the m option
can be omitted, but if only one is given, it will be
interpreted as the acceleration. If no parameters or the flag
’default’ is used, the system defaults will be set.
If the ‘threshold’ parameter is provided and 0, the
‘acceleration’ parameter will be used in the exponent of a
more natural and continuous formula, giving precise control for
slow motion but big reach for fast motion, and a
progressive transition for motions in between. Recommended
‘acceleration’ value in this case is 3/2 to 2, but not limited
to that range.
Now, to interpret this. The acceleration fraction tells it how much faster you want the cursor to go when it starts moving fast, and the threshold is how far you must move it before the acceleration kicks in. "xset m 1/1 1" simply sets the acceleration to one and the threshold to one, so that the thing always travels at a uniform speed. If you want it to go faster, change the fraction to something bigger. Using a "2/1", or even just "2", should make it go twice as fast, and 1/2 will make it go half as fast. Using a threshold of zero makes it use a natural curve setting, so that the farther you move, the faster it goes, in a smooth progression (within the limits of the maximum acceleration, of course).
You'll have to play around to find settings you like. I've personally found that my trackball feels best with a setting of "5/1 5", for example, since it takes forever for it to travel across the screen under the default settings.
As for mouse scrolling, I don't believe that's a function controllable by X. To the computer the mouse wheel is really just a set of two buttons that click 'up' and 'down' over and over. It's up to the individual programs or the desktop environment to translate those signals into meaningful actions. kde has a mouse-scrolling setting for example, as does firefox.
