Uh oh. There's talk that Microsoft Bing will be replacing Google as the default search engine on the iPhone. There's certainly no confirmation, but this speculation does fit with prior reports of talks between Apple and Microsoft. Update: Maybe not?
There are apparently also some sources who are saying that Apple and Microsoft are simply discussing adding Bing as a search engine option on the iPhone rather than having it replace Google.
At this point this whole thing boils down to being sources-against-sources and speculation-against-speculation. We'll know what's going on for sure when either Microsoft or Apple starts talking. [All Things D via TechCrunch]
Update: Added details about sources who are contradicting the original speculations.