Republic Wireless offers unlimited everything for $19 a month, but is it too good to be true?

Republic Wireless has been kicking around in beta form for about a year now, and they have recently me to spend some time with their phone and their service. I'll admit, I went into it all a bit skeptical. I understand the phone choice (the lowly Motorola Defy XT) is far from ideal for an Android power user, but that's not what had me scrutinizing things so closely. It was the whole idea of unlimited calls, texts, and data for just 20 bucks a month using a Wifi connection when available, and how...