All things Google weblog Google Operating System details how to take full advantage of Gmail Superstars, a souped-up version of Gmail's standard yellow star available in previously mentioned Gmail Labs. When enabled, Gmail Superstars allows you to set the star to one of 12 different icons for more robust labelling via the previously single-function star icon. The really cool part? Gmail Superstars are incorporated into Gmail's advanced search, so you can use queries like:
...to narrow down your starred items. Even better, you could bookmark specific star searches with the previously highlighted Quick Links feature to set up quick access to any Gmail Superstar. Be sure to check out the original post for all the different available search terms.