Apple is now seeding OS X Lion 10.7.2 beta builds to non-developers for testing through the invitation only AppleSeed program. This program is only available for individually selected customers (and you would know if you were enrolled in the program), and has been around for years, but it looks like Apple is kicking it into high gear in anticipation of the release of iCloud.
If you have received an email from Apple to join the program, let us know in the comments—and make sure to actively assist Apple in finding bugs.
OS X Lion Software Update Invitation
Apple invites you to participate in a software seeding project. Our program, Apple Software Customer Seeding, provides customers with access to pre-release software so that they may explore new features, perform early compatibility testing, and submit feedback to Apple engineers. We have selected you, based on a referral and/or prior participation in our program, to assist us in testing an upcoming release of an OS X Lion Software Update. You must have OS X Lion 10.7, build 11A511 or 10.7.1, build 11B26. Please follow the directions below to complete the invitation process.