Today only, Amazon offers the Kensington KeyFolio Pro Wireless Bluetooth Keyboard for $39.99 with free shipping. That’s 60% off of list and the lowest price we could find for this 4-star rated keyboard for iPad 2. It offers both landscape and portrait use.
This will likely also work with Apple’s new 3rd Generation iPad as well (though Bluetooth 4.0 Keyboards could start showing up soon)
We haven’t tested this model but we’re fans of the similar Zagg Keyfolio keyboard case, although it is over double the price.