Nintendo leaked that they are working on a Super Mario All Stars Special Edition for Wii. This special edition will come with a soundtrack CD with music from the entire series and a booklet on the history of Mario. There is no news if the graphics will be updated.
If you don't know what Super Mario All Stars is, it was a game released in 1993 on SNES that contained graphically updated versions of Super Mario Bros, Super Mario Bros 2, Super Mario Bros 3 and Super Mario Bros: The Lost Levels.
This game is set for release in Japan on October 21, 2010 at 2,500 yen, around $23. There is no word on an international release, but let's keep our fingers crossed!