Earlier today, I started some Shui Xian from Norbu, and still have the pot sitting with yet another very long infusion.
When that one started to require several minutes, I moved on to a package of the Ali Shan "High Mountain Beauty" oolong from Norbu, from summer 2009. I really loved this tea when I first tried it, and Greg found a packet of it leftover and included it in a group of teas he sent me as a gift recently. I know there have been debates here about the durability of vacuum packed teas: this one is now 3 years old, just opened, and still delicious. Some of the most delicate floral notes are gone, but the sweet spicy Ali Shan basics and the elusive special something from the jassid bug is still wonderfully present. It would not be worth top dollar in its present condition, but it is entirely worth drinking and enjoying still.
The cold isn't gone away yet, but a day of steady tea-hydration has made it a lot more pleasant.