The reference to memories was specifically responding to this:

That site keeps track of how many have favorite your work. Since many authors might be coming here, I think having some kind of like/favorite/kudos button would be great

To me, the memories feature is a poor implementation of social bookmarking that, if it had been done well, could've beaten Delicious before Delicious even started. It's a memories/favourites/bookmark feature, that is due for an overhaul.

Admittedly, I did misread it--for some reason I read hte first sentence that I quoted as being "site keeps track of work you've favourited" or similar.

On Twitter, for example, what you 'like' by starring it is stored so you can go back to them--I think I've used the feature once, but it's there.