I use one of the cheap "straight talk" phones from WalMart. Unlimited talk & text web, $45 a month, no contract. No, I don't NEED it, but when I'm on the road, it's indispensable when I need to contact my family & vice versa. Like it or not, it's a "necessary evil". Would you NOT want to be reachable when you're away from family, or in a pinch?
I also get all my Vonage call messages forwarded to my email so I don't miss anything...and if I run out of minute money if I'm low on scratch? No big. I just renew when I can. No penalties. It piggybacks the Verizon network, and the service is excellent.
I know it's not deemed as "cool" or whatever as the latest and greatest, but I don't need web on my phone...it can run for 30 bucks unlimited w/o web... I also don't need contracts or penalties. I can coffee shop anytime I want for free wifi and my web book...I don't mind carrying two small devices, they fit in my bag. And, I don't come off as a douche surfing on a phone when someone is trying to have a conversation with me. I effing hate that.