The Terminal application in Panther supports the x-man-page URL type. That is, the following URL, when used with Safari or the open command, will open a Terminal window with the ls man page displayed:
x-man-page://ls[robg adds: This style of link will probably work from anything that supports active URLs; I pasted it in iChat and it also worked directly from there when clicked, and it also worked in Mozilla, IE, etc.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20031225072602242