We're not exactly sure how this all went down, but we trust Erica Sadun over at TUAW when she says that it appears that the iPhone's SDK key -- which will probably be required by all "official" third-party apps -- has been leaked. Two different sites currently have the key posted, but it's all just for show until next month, when the SDK hits for real -- and the code is undoubtedly changed.

[Via TUAW]