Typing "jobs" and "wozniak" in the Dictionary application or widget utility will bring up some obvious definitions of these words. You even get the correct pronunciation.
[robg adds: There seem to be a ton of names in the dictionary; gates works, too. So does Schiller, but it probably doesn't return the individual you might be thinking of. What's odd is the behavior of these alternative defintions. Say you have a sentence like this:
"The gates of the old mansion slowly creaked open."
If you control-click on gates and choose Look Up in Dictionary, you'll get Bill Gates' entry. The same thing happens with the word jobs in a sentence -- you'll see Steve's entry. The only way to get the "true" definitions of these words is to enter them in the search box of the Dictionary application directly. If you do that and wait, you'll see all the possible defintions. Even stranger, though, if you just type the word and hit Enter, you'll get the 'real' definition by default.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20050502204257808