While Apple may have been intending to demonstrate their new Enterprise features last week, they also - likely accidentally – unveiled another upcoming addition to the iPhone: contacts search.  Spotted by Daniel Ahdout, the functionality is hinted at by the appearance of a small magnifying glass icon at the top of the list; you can see it yourself at 9 minutes 30 into the official Apple SDK Roadmap video.

While missed by existing users, the search will be almost essential once the iPhone begins synchronizing with Enterprise accounts, which will likely add hundreds, if not more, records to the handset.  The existing UI of scrolling through the list by initial letter will become increasingly inefficient.

Apple are yet to release a complete list of Firmware 2.0 functionality, with the update expected in June.