There has been a revival of the 2D platforming genre during the past couple years. This is mostly thanks to Creative indie developers. I personally think its awsome, and so i want to provide everybody with a list of the Best and worst recent 2D platformers.

Best:

Braid

Trine

And Yet It Moves

New Super Mario Bros

shadow Complex

little Big Planet

mega man 9

splosionman

A Boy and His Blob

Lost Winds

Lost Winds: Winter of Melodias

New super mario bros Wii looks pretty promising as well