Apple has seeded OS X Lion 10.7.2 (Build 11c55) to developers, and what’s different from this build is iCloud Beta is now built in.

OS X Lion Software Update 10.7.2 is an update to OS X Lion 10.7 and includes support for iCloud beta. Please refer to the seed note for more details and installation instructions. (Mac Developer Program membership is required)

iCloud used to be a separate package for developers.