I’ve had Republic Wireless for the past couple of months. It hasn’t been perfect, but for $20.58 a month for unlimited voice and data (includes taxes and everything), I’m quite satisfied.
The phone is not the latest and greatest, but it’s waterproof and ruggedized and the battery lasts at least a full day for me. Once or twice a VOIP call has been poor when the wifi network was heavily congested, but generally, VOIP calls have been excellent.
I’m looking forward to cutting my monthly bill by 80%! And by by Blackberry.