SSAS 2005/2008 and WAN impact best practices

I have a situation where our SSAS database/cubes are in one data center in MN and the proposed web app front end (OBIEE) will be in another data center in Boston.  Will this architecture perform successfully with data going over the WAN for queries or do we need to have the SSAS database/cubes in the same data center as the web app front end, so both the SSAS database/cubes and the web app front end (OBIEE) are in Boston?  Along with answering this question, please point me to some documentation to support the solution.