I’m a little late to the celebration but on Friday some there was some exciting news regarding Power View was announced. You can read about the details of it at the Analysis Services and PowerPivot team blog for Microsoft here.
This is part of a SQL Server Cumulative update pack that you can download here.
http://support.microsoft.com/kb/2833645
One thing to probably make mention of that you can ready on the Microsoft team blog is that this is only for SQL Server and SharePoint Power View. If you’re using Power View with Excel 2013 only then you’ll have to wait a little longer for an update.
Either way this is great news and for those that were anticipating projects to convert Multidimensional cubes to Tabular or PowerPivot so they could use Power View.
Devin Knight 
You should mention that it works *THROUGH* a reporting services reporting object in SharePoint, that ‘tabularizes’ the results so PowerView can consume the output. A clumsy workaround that is slow on many standard MDX queries and produces erroneous output in some situations. not to mention you now have SSRS and SharePoint throttling the entire querying pipeline. Its weak.