Excerpt: With three years of major iPhone software versions under its belt, Apple’s strategy for releasing updates has fallen into a recognisable pattern. So far, every release has been anchored by a tentpole feature that many will argue should have been there from the beginning. In iPhone OS 2.0 , that was support for third-party apps; in iPhone OS 3.0 , it was cut, copy, and paste; now, in the re-branded iOS 4, it’s multitasking.
Pros: Multitasking features are a welcome addition, lots of great, smaller refinements, zippy performance
Cons: Holes in multitasking functionality, Mail still lacks flagging and full text search, despite folders, app management still feels clunky, no iPad version yet.