I came across the UNIX command nice, which says you can, "invoke a command with an altered scheduling priority." I read this to mean that you could possibly start File Sharing with a lower processing priority, thus causing a reduced drain on system resources.
If anyone is savvy enough to try, please let us know.
-aaron
[Editor's note: See the comments -- nice is broken in the current release of Mac OS X, so this command will have no impact].

