I think there are 6 bundles. One with Mario Kart Wii, one with New Super Mario Bros. wii, one with Wii Sports Resort and Wii Sports, a red one with NSMB Wii and Wii Sports, one with Wii Fit Plus and a balance board, and at last there's the one with no GC support that I think comes with Wii Sports and Wii Play.
There might be some more (there's a blue Mario & Sonic at the London Olympics one, or something) , and some of them might no longer be buyable. This really isn't my field of expertise.
But yes, it's still bundled with roughly half the sold Wiis. Perhaps slightly fewer than half of them.