Apple Insider posted a story that Apple revealed that it will be seeding one of the first beta builds of OS X 10.8.3 Mountain Lion sometime after Nov. 26.

From the email:

Thanks for accepting our invitation to test OS X Mountain Lion 10.8.3. The invites were sent out a little too early! We are working hard to provide you with a seed build soon, but we wanted to let you know that you have not missed any seed announcements. Please enjoy the USA Thanksgiving holiday! The Seed Team will be enjoying a break as well. Look for more information about the 10.8.3 seed during the week of November 26th.

  Apple to seed beta version of OS X 10.8.3 after Thanksgiving weekend