I just couldn't let this go. Both the one liner and the perl program I
wrote were too darn slow for me. So I wrote a more efficient perl
script that does about the same thing. It's a bit fancier as well, it
prints progress dots as it walks through the directory tree to show
that it's still running and you can pass a starting directory on the
command line if you want. It's about 14 times faster than either of
the other two methods.

You can read about it and/or download at:

http://www.buchanan1.net/find_big_files.shtml

Note that the ftp link is on my other web provider, as they offer
anonymous ftp, so don't be surprised that the file is off-site.