I'm such a big fan of Trader Joe's that when I moved to Pittsburgh, I actually looked it up on Google maps. AND I even took it into consideration when renting my apartment my first year here! Organic Mango Passion Granola cereal, Mascarpone cream, Kettle Corn, Mochi ice cream, Banana chips, Orange Chicken--there's so much good stuff here.
It can get crazy busy on the weekend afternoons, so avoid those times (unless the Steelers are playing).
One of my friends in Pittsburgh keeps a blog, "What's Good at Trader Joe's." http://www.whatsgoodattraderjoes.com/ Check it out for ideas of new foods to try.