Inspired by the work on the prefPane and App named SharePoints [editor: method one], as well as the direct route [editor: method two] explained in this forum for adding shares, I wrote an AppleScript to do the same things in the Finder, the way it used to be in Mac OS 9.
Visit www.ethan.com/source_sharing_is.html for the source script and downloadable Toolbar applet. Contact me at ethanw@aol.com with comments and ideas.
[Editor's note: I haven't tried this yet, but the source is available, so you can see for yourself what it does.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20011125212614122