Engadget posts a photo claiming to be an upcoming TomTom GPS module for the iPhone.
The poor quality image depicts a small add-on device which plugs into the bottom of the iPhone. Meanwhile, the screen shows a typical GPS view.
The validity of the photo itself is difficult to assess, however, its been rumored that select developers may already have access to Apple's upcoming SDK. It's conceivable that Apple has selected key hardware manufacturers to ready new iPhone accessories.
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This would be pretty neat although unfortunately it is now reported to be a fake screenshot. Were the iPhone to have true GPS capability as some other cellphones do then that would make the iPhone a even more tempting purchase choice for me after the release of the 3G iPhone and official SDK (which would hopefully provide a good selection of officially developed applications). Yet I still will be giving Android powered phones a look too...