The SQL Best Practices Team has just published a new article entitled Scale-Out Querying with Analysis Services Using SAN Snapshots. The best practices site doesn't mention it yet (it was just posted today) but it can be found by searching the downloads site.
This is one of the available methods for scaling out SSAS queries and is especially useful on large installations. It describes using SAN snapshots in a load-balanded environment to handle more simultaneous queries. Kudos to the best practices team for continuing to push this sort of information out to the public.