Multiple news reports are saying that Google has plans to enter the wireless business. The idea is that you'll be able to buy a phone with Google as the service provider. The interesting part, however, is that Google is negotiating with Sprint and T-Mobile. The phone you buy will work with both carriers, and it will connect to whichever network has the best signal. It will also utilize Wi-Fi whenever possible.
This is only a rumor as of now, but it's an interesting idea. The cell phone industry is ripe for disruption.