I'm playing
The Legend of Zelda: Phantom Hourglass (DS)
This Wind Waker sequel spells success on the high seas with a DS stylus. Goodbye end-of-the-world plot device and hello good times in (sorta) tough dungeons.
Burnout Paradise (PS3)
The fifth installment to the series arrives promising "a truly next-generation game" and a seamless open-world environment.
Left 4 Dead (Xbox 360)

An incredibly tense multiplayer experience like no other. A must buy for shooter fans.

I've Beaten
The House of the Dead: Overkill (Wii)

This immature, Mature rated title is just the gore covered dose of arcade-y fun the Wii needed.

The Legend of Zelda: Twilight Princess (Wii)
It's the same Zelda we've been playing since 1998, tweaked and balanced to perfection.
Fallout 3 (PS3)
The freedom may scare people used to more linear shooters and the simplified customization might disappoint hardcore RPGers, but if ever a game was worth broadening your horizons for, this ...
Mirror's Edge (PS3)
A unique and enjoyable re-imagining of the First-Person Action Adventure genre, though a little rough in some small bits (also be wary if you suffer from motion sickness).