On my 2007 iMac with the new thin keyboard, the F17, F18 and F19 function keys all open the Find Bar in Safari 3. Using these function keys is an alternative to using Command-F. Safari's new Find behavior is quite nice, if you haven't played with it much. You can use the Enter and Shift-Enter keys to move forward and backwards between the found items; press Escape or Command-perido to exit when done. (In previous versions of Safari, I used SafariStand to automatically open the Find box when ever I start typing but that function doesn't work yet with Safari 3.)
Mac OS X Hints
http://hints.macworld.com/article.php?story=20080101150128288