Lately, I'm guessing that Nintendo plans to stretch the VC's classic content out as faaaaaar as possible...possibly on to the next console and maybe even the one after that. It (sadly) makes a lot of sense business-wise. People aren't going to buy 50 games if you put 50 games online right away, they're only going to buy one or two. If you put new games out every week, maybe they'll buy one every couple of weeks. So keep that addiction running as long as possible.
As for the big first party games, I imagine we'll see a few more during the first quarter of 2007, when the new Wii game lineup starts to dry up.