I've pushed a new branch (centaur) of the ECL for iOS project to github, which contains a number of fixes to get ECL compiled under the latest 4.2 SDK from Apple. This release has been tested on iPhone and iPad devices running iOS 4.2 as well as the older 3.1.3. Please refer to the updated README for further details.

http://github.com/kriyative/ecl-iphone-builder/tree/centaur

Many thanks to Terje Norderhaug and Anthony Fairchild for their bug reports and feedback.