Last night, Apple seeded a new build of their upcoming Lion update, version 10.7.3, to their Mac developers. Build 11D36 includes no known issues, indicating that a public release is imminent, and Apple asks developers to focus on iCloud Document Storage, Address Book, iCal, Mail, Spotlight, and Safari as their main areas of testing.
Mac OS X 10.7.3 is available on the Mac Developer Portal right now in the form of either a delta update — which weighs in at 986 MB, providing that you’re updating from the 10.7.2 — or the full combo update — which can be used on any previous version of Lion and weighs in at 1.2 GB.
If you’re a developer, then you should probably begin testing your apps to be sure that they are completely compatible with it before it releases to the public. Also, please review the seed notes for further instructions on testing.