Microsoft has released details about the new Data Mining, BI and Data Warehousing features of "Yukon", the next release of SQL Server, entitled an 'Overview of Business Intelligence and Data Warehousing in SQL Server Yukon' at
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/prodtechnol/sql/next/DWSQLSY.asp
Update... more Yukon articles released on TechNet at...
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/prodtechnol/sql/next/default.asp?frame=true