Yes, very delicious!
And they also grow great in a pot on the balcony, just dig out a plant in the woods, they'll multiply like weeds
edit
Just wanted to add: If you are in an area where tapeworms or similar parasites are prevalent, be sure to give any wild berries a good rinse before eating
Wouldn't the "no postage required" business reply label link to the original mailing anyway, i.e. clould that not be linked to your address?