Really worried about eavesdroppers? German company Cryptophone is selling a special version of HTC’s XDA Pocket PC Phone that comes complete with built-in encryption technology that makes it next-to-impossible for anyone to intercept and listen in on your phone calls. The catch is that only the phone can only make secure calls to another XDA or a PC with the same software installed on it (it can make regular calls to anyone). CryptoPhone is selling a pair of the phones for 3,499 euros, so you have to really value your privacy.