When using Windows I use VistaSwitcher to scroll through open windows. I have used Compiz to set Ctrl+Scroll to next and prev windows but I'd (ideally) like something with the ability to see the windows as I scroll.
Screenshot of Shift Switcher in action from compiz.org:
But be aware: CCSM is an advanced tool. Use with caution. This tool allows you to deeply configure Compiz's settings. Some options may be incompatible with each other. Unless used with care, it is possible to be left with an unusable desktop.