Just days ago, Clark told you about Verizon's unlimited calling plan for $99. Verizon's move prompted AT&T and T-Mobile to match or best their offer in subsequent days. Sprint, meanwhile, took its time before jumping into the fray. Sprint was busy reporting a $30 billion loss and a projected drop of more than 1,000,000 customers over the next quarter. But if you're into deals, boy, does Sprint have one for you. They're offering unlimited calling, web surfing, texting, e-mail, GPS and TV for $99 per month. Each additional subscriber will pay $5 less per month on a family plan. This is a real long pass and Sprint is hoping it doesn't bomb. This move represents a real seismic shift in the cell business. Cell carriers have historically made big money on overages. But the future will be all about unlimited calling in different tiers (local, domestic, and even international). Meanwhile, new stats show that 33 million Americans are now exclusive cell users. That figure is up 50% in a year and will only grow.