Continuing a pattern of biweekly releases, Apple tonight seeded the fourth beta version of iPhone OS 3.0 to developers. Apple also issued a developer pre-release version of iTunes 8.2, which is required to activate the new beta. No new features in the fourth beta version have been revealed as of yet.
One forum poster points out that the latest iTunes 8.2 beta carries references to Blu-Ray data from Gracenote, suggesting that iTunes could support the reading/recognizing of Blu-Ray discs. This note is not present in the current version of iTunes: