If you're clinging to your BlackBerry because of its physical keyboard, you just lost one of your last excuses: this TK-421 iPhone 4 case includes a physical keyboard that flips out whenever you need some thumb-tapping typing action.
The keyboard case from ThinkGeek - also available for iPhone 3GS - connects to your phone via Bluetooth and is compatible with its email, browsing, notes and calendar apps. All apologies to 3G owners, but without Bluetooth support, this becomes nothing more than chunky accessory. For those who've upgraded iOS phones in the last couple of years, though, you can pick up the TK-421 for $US50 starting in late November. [ThinkGeek via ChipChick]