PC World By now you know the bullet points: the new 3G iPhone is smaller, cheaper, and faster than its predecessor. But at what cost? While we know what Apple has told us, it appears that AT&T is having its own say about the iPhone 3G and what it means for the future of the carrier’s relationship with Apple.

As with the original iPhone, you’ll have to sign up for a 2-year contract in order to grab an iPhone. The iPhone 3G will have slightly higher data plan prices than the original model: individual users will now pay US$30/month for unlimited data, and business users will have to fork over $45/month.

But there are also a pair of interesting behind-the-scenes developments in the Apple/AT&T relationship. According to the wireless provider’s press release, the two companies have ditched their revenue sharing arrangement: no longer will Apple get a cut of the monthly subscription fee that customers pay to AT&T.

To translate for us mere mortals: they’re artificially lowering the cost of the iPhone so they can sell more, and hence make up for the difference in cost. This does raise some questions, however: for example, it suggests that the price is subsidized in all 70 countries in which the iPhone is going to be on sale, since Steve Jobs said that the price would be a “maximum of $199″ globally.

So, is it too good to be true?