What about a 2GB memory for a canon ixus 60 digital camera, is it a good idea to use that?

If your camera is not limited to something under that, then it may well be one of the best size cards to own.

While I do own a couple of 4GB cards, I find that the 2GB cards are the most useful. In addition they give you the most bang for the buck. I recently purchased one for under $20.