Toggling Spaces on/off instantly

Instead of clicking 4+ times to get to the preferences panel and toggle Spaces, you can simply use this AppleScript:

tell application "System Events" to tell spaces preferences of expose preferences to set spaces enabled to (not spaces enabled)

As usual, I hook it up to a keyboard shortcut using iKey.

Enabling Bluetooth File Transfer on Leopard

Among the changes Leopard introduces is that unless you enable "Bluetooth Sharing" in the Sharing preferences panel, any attempt to send files to your Mac via BT fail. For me, this is a critical part of my GTD work flow, of voice memos from my mobile phone being transfered to my Mac for processing this way.

Outgoing transfers, which I hardly use, seemed to work regardless of
this setting.

Too bad Apple doesn't bring up some informative error message on such attempts and had me waste quite some time figuring this out :-(