In case you've been wondering how to delete in front of the cursor on a PowerBook ... press fn-delete to generate a forward delete (on Ti models, at least).
(Haven't seen this documented anywhere: there's no forward delete key on the (Ti) Powerbook keyboard or any indication on the key caps of a function key equivalent.)
[Editor's note: Not exactly an OS X tip, but important nonetheless. It's the same key combo on the 2001 iBooks ... and it took me a while to find the combo when we bought ours, so I thought it was worth a quick mention here.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020324103917690