AT&T recently dropped the price of refurbished 3G iPhones to the meager sum of $150. The price drop, along with a bevy of new features being uncovered in iPhone OS 3.0, have fueled speculation that AT&T is clearing out stock to make room for the next-generation iPhone.Reports of new hardware from Apple have reached near fever pitch. No news regarding a new iPhone has come from Cupertino, but that hasn't stopped the blogosphere from running rampant with all sorts of reports about supposed new features of the next-generation iPhone. Among the upgrades include much more powerful cameras and more internal storage.

We also know that iPhone OS 3.0 is on the way, and many of the features being leaked by developers point to services that aren't necessarily compatible with the existing iPhone hardware, such as video recording.

Now, AT&T has dropped the price of refurbished iPhones, further increasing the belief that Apple is set to release new hardware.

Those interested can get a refurbished 16GB 3G iPhone for $150, which is half the price of the new iPhone. The 8GB version is available for $100. Refurbished phones are slightly used, but guaranteed to perform as new. Of course, buyers will still be required to sign a two-year contract with AT&T to get the refurbed iPhones at those price points.

Each of these reports is interesting by itself. Take everything together, and it makes a strong case for Apple to announce new hardware come WWDC in June.