Dan Meyers over at Capstone Consulting has put together a package of Reporting Services reports that display SSAS metadata based on Analysis Services DMV’s. You can find them here. Dan did an awesome job on these reports and as he notes in his blog, the design is based on the reports from BI Documenter
One note…you will have to change the linked server in some of the sub report queries in order for all of the report actions to work. It seems Dan was using two different linked server names.