We got a Canon Ixus camera for Christmas with a stardard memory card. When taking the best quality pictures we could, this only enabled us to save 20 pictures.
We bought this 4GB Memory Card from eBay and it works brilliantly. It was much cheaper than you can buy anywhere else! Now we can save over 2000 photos of the best quality on our camera, before we even think about having to download them onto our PC.