Apple has announced the release of Mac OS X 10.7 Lion Developer Preview 2. This new build is named as 11A419. It features refinements to an otherwise stable developer preview and also it includes bug fixes. You should note that you must be registered on Mac Developer Program to access the download. You can access the download through the Mac App Store, or through Software Update in Mac OS X Lion. Also you can access it as a standalone download through the Mac developer center.
If you missed the Developer Preview 1 and want to try Developer Preview 2 then you have to dual boot and install Lion alongside 10.6 without formatting your drive. You should note that if you select this option then you’ll want the standalone download.