The default Claro zoom slider control is pretty boring.
It's also hard to see on top of many basemaps:
Are there any examples of some nice customisations I could use for inspiration?
I like ArcGIS slider over other sliders from tech-giants. There is a lot you can do with dojo!
Check out Ocean Charts from NOAA. They use Flex, have nice transitions and have managed to pack most map navigation functions in one slider. I especially like the back button, something every map designer should consider!
If your app supports multiple base-maps (google, bing maps), and want to create a custom slider, you have consistency issues to consider