That's it, Quicksilver is officially The Handiest Utility Ever. This great tip from Lifehacker
explains how you can use Quicksilver to quickly relaunch an application that has - *ahem*- unexpectedly frozen. Simply call up Quicksilver, find the target application, tab over to the action pane, type "relaunch," hit return and blammo! The errant app gets a kick in the seat. Thanks, Quicksilver!