Amazingly enough, it looks like there might actually be something worthwhile coming on SimDay tomorrow. No, really, there might. Along with the release date changes mentioned below, the official site brings (for the first time in quite a while) a preview of what to expect this SimDay. It mentions that they'll be releasing the new 'Unleashed Lot Exchange', as well as the 'Deluxe MySims feature'. Hmm... no further information is there, so I can't tell you anymore yet.
However, only one more day to wait! Come back around mid-to-late Thursday, and I'll fill you in further on the details of these new site features. Promise!