Tool notes, for future reference. I'd write a haiku, but I have to make it to the mailbox before 5 pm.....
rentzsch.com: fs_usage Intro:
Mac OS X's little-known fs_usage command.
fs_usage is a command line tool that displays file system activity. This is useful in a variety of circumstances. For example, a while back another friend was having problem with Eudora crashing.
link found via Gruber's interesting analysis of a Mac OS X.3.8 bug.