“Under the Covers” - iPhone 4 ad.
FaceTime lets you easily enjoy video calls with the people you really care about… like Santa.
Glif - iPhone 4 Tripod Mount & Stand

Glif is a simple iPhone 4 accessory with two primary functions: mounting your iPhone to a standard tripod, and acting as a kickstand to prop your iPhone up at an angle. From these two functions emerge numerous uses: hands-free FaceTiming, watching videos, making movies, using your iPhone as an alarm clock, and many others.
Source: theglif.com
Pad & Quill
Following in the footsteps of DODOcase, Pad&Quill have developed their own version of the Moleskine case for the iPad, but more importantly the iPhone 4.

Get “The Little Black Book” for $39.99.
Inside The Apple Antenna Test Labs.
Steve Jobs & iPhone 4 Get The Taiwanese Animation Treatment.
MG Siegler's Initial Thoughts on iOS 4.0.1
the bars still fall with 4.0.1. […] But MUCH more significantly, I cannot make the phone drop the actual signal anymore. The bars fall, but the connection remains.
I’m finding the same thing when death gripping my iPhone 4 w/ iOS 4.0.1 as well.
New Signal Bar Mappings for iOS 4.0.1