Suggestion: make control-alt-delete bring up system monitor by default

[Martin Alderson]

1) It's good for Windows converts who will be used to this behaviour.
2) It's good for all users because it's a very easy shortcut to get to
it. When your mouse has borked up and you are desperately trying to
kill an offending process, the last thing you want is to have to tab
round all the panels to get to it.

Any chance this could be done?