I bailed out of the cellphone market after my last contract expired. I'm on Skype Out ($3/mo) + Google Voice (incoming calls go to voicemail and I call them back) + iPod Touch until a compelling reason to enter the market again shows up. Ideally, I'll just get a better iPod Touch and continue to rely on "good enough" WiFi coverage in my area (University WiFi + whatever I can pick up from restuarants/bars while I'm out). I would like to be connected to the phone network 24/7, but it's not worth a 10x increase in price.