Apple has released Thunderbolt Firmware Update v1.1, which addresses a problem with the mid-2012 MacBook Pro (when using certain Thunderbolt cables) that prevented some bus-powered Thunderbolt devices from working as expected. The update requires Mac OS X Lion 10.7.4 or later. (Free, 442 KB)
Create Multiple Inspectors in iWork
Tired of flipping between panes in the Inspector in Keynote, Pages, and Numbers? You can open multiple copies of the Inspector window with View > New Inspector, but even better, you can Option-click one of the icons at the top of the Inspector window to open that pane in a new Inspector.