Check out the Blade Dancer from the OA.
Base speed is 40, at lvl 10 your base speed is now 120.
one level of monk makes the difference( or barb, or anything with faster move, incl. feats). (90 spd as opposed to 120)
however, add in all that jazz, and what do you have? some sick movement.
now do the jump thing.
I wish I had kept that scrap when I did the jump distance calculation. Blade dancers get a +30 I believe to jump and tumble. plus insane people like me would max out the skill anyways (and tumble for some fancy acrobatics) . If I remember righ I got something like 450 feet on a bad roll...But I was doing some wishful thinking with the ninja spy from the OA as well (for an additional +20 to jump and tumble).
I dont see a problem with it, if thats the kind of charcter you want. Then thats the kind of character you should make.
If your looking for a cap. Sure I'd cap it eventually. I doubt that I would cap it before the charcter reached the speed of sound. Assuming its possible.
Besides, most those classes mentioned (mon, Ninja spy, and Blade dancer) are supposed to be quick and agile. its what sets them apart from the fighters and paladins.
Speed is not power.