in my app I'm using sliders to enter a number. The number can be arbitrarily large (addition: but greater than zero), even if *usually* it is within a certain range, so with a slider I have the problem that it requires a "max" value. Conventional inputs just look awful, though, and are harder to use.

So it would be neat if the slider, if wanted, adjusts its own range upon selecting either the min or max value. I implemented it using the slidestop event, but maybe I'm not the only one who'd like to see this in the core -- maybe it'd even be better to give it its own widget? Here's a jsFiddle with my implementation (that surely can be optimized, especially regarding rounding issues that come up quite quickly):

http://jsfiddle.net/6B3Qk/7/