Apple just released a second Lion Developer Preview. The Build is 11A419. Changes are unknown for the moment.
Mac OS X Lion Server Developer Preview 2 is also available as a standalone download. It was not anticipated since Apple said from the hgh extreme beginning that the Server part of Lion would be included in the regular release.
The new developer preview seems to be what TechCrunch called a “golden master” release last week. The final release should be available on time for the June WWDC.