Another big winner for me (on any Android 2.2+ device): tethering via portable WiFi hotspot. Although it's much more satisfying when I run my Nexus One on my A

Another big winner for me (on any Android 2.2+ device): tethering via portable WiFi hotspot. Although it's much more satisfying when I run my Nexus One on my AT&T unlimited data plan than when I get molested by Verizon for my data usage on the Xoom 3GB plan. Theoretically this feature will be coming to iOS soon (it's already present in the Verizon iPhone 4 refresh), depending on how badly AT&T decides to continue to gouge their customers.