For anyone that has got a wii, and wants to play some of the retro games you can get the wii classic controller that plugs directly into the bottom of the wii-mote to give you wireless retro gaming :P
£9.99 is the cheapest I've seen it! [I don't know whether it is in stores as well - it's part of their New Years sale posted here: http://www.hotukdeals.com/deal/115822/choicesuk-new-year-sale-dvd-s-from-/
DONT'T FORGET QUIDCO etc. If you want to save even more money your gamecube controllers will work with the classic games just as well and you can get them cheap ~ £5 from deal extreme... (already posted on HUKD)
Blurb: Over the years, Nintendo has innovated with controllers and control schemes that have become industry standards. The Classic Controller blends elements from Nintendo's NES, Super NES, and N64 controllers to allow for seamless play control over the titles that span the Virtual Console library.