James Coviello sent this cute vest down his Spring 2008 runway:

It inspired our Vestish pattern from our Spring issue:

Now it's popping up all over retail for fall:
At Nordstrom.
At The Gap.
At Target.
Another one at Target.
So there's still time to knit yourself a vest like this. The key elements of the trend are the length of the vest, the relatively long v-neck, and the pockets in the front. Knit yourself a Vestish, or alter another vest pattern to include these elements, and you're all set for Fall.
-Robin