After looking at the database, I noticed something that furrows my brow...
There is no symbols for the downloadable platforms!!!
But really, it would be nice just to have perhaps a light blue "VC" for the Virtual Console, a red "PSN" for the Playstation Network, and a light green "XBL" for Xbox Live Arcade. Two minutes of work, right?
Also, since we have these new platforms, and Stickball has data for XBL downloads, perhaps it would be possible to start a "Downloadables" chart. It would probably only include XBL data at this point, but could include PSN and VC data in the future.
I think the icons should at least be focused on if nothing else.