Quite a mixed bag:
Donkey Kong Jr - NES
Victory Run - TurboGrafx / PC Engine
Columns - Sega Megadrive / Genesis
Ristar - Sega Megadrive / Genesis
The Virtual Console Archive recommends Ristar as a essential purchase. The other games are all OK if you have Wii Points to burn.
It's great to see Nintendo releasing titles at this rate. With all the fuss about Microsoft struggling to even release one Live Arcade title each week we do have high hopes for Nintendo to show everyone how it's done!