Apple has released a firmware update for early 2009 Xserve models that improves "compatibility with virtualization products utilizing VT-d and system reliability during the boot process." More information regarding installing firmware updates on Intel-based Macs is available on Apple's Web site. Instructions for updating a headless (i.e. without monitor) Xserve are also available. (Free, 1.81 MB)
Spacebar Magnifies Photos in iPhoto '08
In iPhoto '08, you can choose whether double-clicking on a photo will edit it or magnify it. I prefer my double-clicks to edit photos, but every now and then it's nice to magnify a photo. To do that, even when double-click is set to edit, just select the photo and press the Spacebar.