Interesting. I use diff output if I need to stop working on one feature, fix something else, and then get back to work on the original issue. It's an imperfect approach as it does not record metadata changes (delete/remove/move). Looks like subversion 1.5 added named changelists to help support this, but you can't 'stash' a changelist, and it's not really a proper analogue.
- landonf@bikemonkey.org