The first item I really liked was the updated Airport Extreme. The feature that impressed me that I'm not sure any other manufacturer has included is the public and private networks on the same device. The new Airport has a public 2GHz network and a private 5GHz network. This is a great feature for businesses that want to share their network but not their data.
The second item which is probably not new but I just became aware of it is that Mac Pros have two extra SATA ports built onto the motherboard that are unused. With a little knowledge, users can add two SATA ports to an unused PCI slot on the back of the computer very inexpensively. Additionally, users can add a Blu-Ray optical drive in their second optical bay in the Mac Pro.
Be advised, Apple prohibits the playback of commercial DVDs on Macs. Your own creations should play back just fine.
Erik