I can't believe no on has posted this yet.
That's right, it's been 25 years since Super Mario Bros. and the NES.
In total, there are 10 Super Mario games in the series, from the NES to the Wii.
Also, they're re-realeasing (ignore the spelling) Super Mario All-Stars, which holds 1,2,3, and SMB 2 from Japan. This is for the Wii.
The game case holds many things to celebrate the 25th anniversary. There are more details here:
http://mario25.nintendo.com/allstar/(It will be in the US on December 12th.)
Three cheers for Mario!