For more information about the Windows Phone 7.8 availability see this link.
Hmm ... That does not help at all. All the information suggest that the update is (tehchnically) available (in Estonia), but what is missing is the acutal update form the phone. Zune declares that the phone is up to date, and that no updates are available. At the same time I know few people, who have stated that they do have the update already. What is up whit this? Zune should work universally the same way?