Pizza isn't a traditional holiday meal, but in this case I may be willing to make an exception. Papa John's just released their very of Android app in the Market, and to celebrate they're giving users a big, juicy discount. Order a pizza through the app and you'll get a generous 25% discount, valid through New Year's Day. (Think of it as getting two slices for free.) Any full-sized pizza qualifies, even "specialty" varieties, but you'll need to sign up for an official Papa John's account first.