Apple just informed registered OS X developers that an update to the OS X Lion Developer Preview 2 is now available. The update can be downloaded from Software Update on computers that have DP 2 already installed.
From systems that have developer preview 2 of Lion or Lion Server installed, run Software Update and download Mac OS X Lion Developer Preview 2 Update. You must also download Xcode 4.1 Developer Preview 3 available from the Mac Dev Center to build apps with this version of Lion.
If you have not yet downloaded developer preview 2 of Lion and Lion Server, get your redemption code from the Mac Dev Center then proceed to the Mac App Store to redeem your code and download Lion.
Three weeks ago, Apple released an update to the original OS X Lion Developer Preview to enable "downloads of Mac OS X Lion seed builds from the Mac App Store". It is unclear what kind of changes went into today's update to Developer Preview 2, but we're hearing build number is 11A430e. Mac OS X Lion DP 2 was released on March 30th.
Update: from the changelog, Apple says this update is recommended to all users running Lion Developer Preview 2.