Hi :)
I think that this hasn't been suggested in the past, and if it has then I probably overlooked it and I'm sorry.
I thought that it would be a good idea to have a section in the store where people can comment about the products they bought. The best place for this would be below the pictures of every item. So, for example, there would be an "insert comment" button (or just a text field) below the calendar pictures on this page. Maybe even add a rating system (like reviews).
The basic reasoning this is that if I were to buy a product, I would want to know what other people (who already bought it) think about it. I think that most people (especially those undecided people who don't know what to buy) would appreciate it.
The main problem would be that it may be abused, but that's why I said that it's for people who already bought the items (so not every stupid person can make stupid comments).
And finally: lame HTML edit + Photoshop = Example!
I also added the "share" button (it would also be good for NG if users could Digg items in the store and stuff). And please look at it, because I spent a ridiculously long amount of time making it, despite how easy it is to make, lol