O2C freed us up about 800 mb of space the other day. Tamar, you could add these to the oversized smilies until Vlad figures out how to shrink 'em.
in general, I think something representing "internet = serious business!" might fit. something ripping off that animated avatar that was in use a while back with a couple of the Python guys saying "no it isn't/yes it is" over and over something that was a sendup of Shoes and his famous cookie pic...