At today's MMS 2010 presentation I demonstrated browsing one of the Adventure Works 2008 cubes for SQL Server Analysis Server (SSAS). Here is the link for this and other projects:
http://msftdbprodsamples.codeplex.com/releases/view/37109
In addition I found this link helpful to get the samples properly installed:
http://www.ssas-info.com/analysis-services-faq/29-mgmt/242-how-install-adventure-works-dw-database-analysis-services-2005-sample-database