Just in case you were thinking about ditching your iPhone 4 for a brand new HTC with a physical keyboard and Android - hold on! You can get a sliding QWERTY thing on your magical iPhone 4, too.
The Nuu Mini Key protects your iPhone (with all that bulk, it’s no surprise) but most of all puts a sliding right below the device. As Engadget reports, however, they tested a prototype over at IFA 2010 and they found the keys hard to press. Also, the device connects via Bluetooth and doesn’t include a battery pack - a feature you would expect from such a case.
Take a look at the picture below. The Mini Key will be available by the end of this year at $60.