I wish to press Super (or any other key combination) and start typing to launch programs. How do I do it? Thanks
Super key is default key for opening dashboard .
You can find more help from this link
or otherwise you can use Compiz Configuration Settings Manager for changing keys
After that open dash and type ccsm, then go to unity plugin option
Change key from here.
super key is the default key for "dash home". By the way, press super key and hold it, and it will show you all keyboard shortcuts.