Just received word that Microsoft has posted 3 new courseware titles under the "What's New in SQL Server 2008" umbrella. Available titles are Business Intelligence, Database Development, and Enterprise Data Platform:
https://www.microsoftelearning.com/eLearning/offerDetail.aspx?offerPriceId=139087
On a related note, I have downloaded and installed SQL Server 2008. I'll post more information later once I've had a chance to completely review it, but two things immediately stand out as positive improvements: Intellisense in the query window, and C# scripting in the SSIS script task/component.