As much as I hate to admit it Macs and Mac apps sometimes crash. However there is a great way to automatically restart applications without touching that mouse (bleh!). An article on Macworld looks at automatically restarting crashed programs. It uses standard OS X UNIX stuff like Launchd via the FOSS Lingon.
I just banished my Quicksilver dock icon (and yes I used to restart Quicksilver without a mouse anyway). You might want to do the same.