If you are in need of pizza in area of Rantavitikka or Viirinkangas, your natural choice should be pizza-bar next to Lillin-pubi in Viirinkangas.
You can order the pizza in net, but that's just starters. This little bar has a Canal+ channels and is equipped with wireless network which works more certainly than the one in the university, has printer, fax and even paper for those :D -And on top of the good service, the 12-pack of beer is cheaper than in Prisma!
My favorite is kebab-pizza, it beats even the reindeer-pizza in Railwaystation. There's loads of sweet pepper and jalapeno, quite light and juicy.