Question 3.1 Resizable Widgets

In the google IO release on HoneyComb 3.1 is stated that there will be resizable widgets...

Anyone know how to do it? or is it not available for 3.1 Xoom Wifi?
Android Obsessed: GSM Galaxy Nexus, Wifi MOTO Xoom (CM9 w/ Tiamat Kernal), RIP: LG G2X Acree's ICS w/Faux's Kernal), RIP: Archos 101, Nook Color, Samsung Fascinate (EC01 w/Voodoo Lagfix O/C 1400mhz), Moto Droid (Ultimate Droid 3.3.2 O/C 1250mhz).