The current Deal of the Day is Tony Hawk Ride for Wii, PS3, or XBox 360, $40. I'm kind of curious how this game works, so this one is tempting... I'm not sure if I'll be able to find it at a price like that again.
Looking at the Lightning Deals that have already come, I'd say I haven't missed anything. The next one up, starting at 6PM PDT is "Enjoy this massive fantasy epic." Could it be an RPG, perhaps Arc Rise Phantasia? The last one, starting at 8PM PDT, is "Transform your Wii controller into sports equipment," so that one is clearly more shells.