For many years I have throught that maybe the penny should be phased out. I have several buckets at home filled with change mostly pennies. I figured it wouldn't happen because of the cost making a change but Canada is being bold.
Canada is phasing out the penny in their currency. Support did a fantastic blog on how that affects GP users at this point.
The penny was officially phased out on Feb, 4th, 2013 and is no longer accepted, all cash purchases are now rounded to the nearest nickel. All electronic purchases will continue to use the existing prices since no actual coins are used.
I don't miss it, but I kept a few rolls as a keepsake ;)