Someone pointed out MDX Workbench 1.1 to me today. Haven't looked at it yet, but it could be handy.
John.
I saw these two as well:
XML Analysis SDK (Beta) - seems to provide a communication layer to Analysis services via XML. http://www.microsoft.com/downloads/details.aspx?FamilyID=02ddcc80-604b-4343-9d42-4298e10a1a56&DisplayLang=en
and the ADOMD.NET (Beta) for communicating with the XML Analysis: http://www.microsoft.com/downloads/details.aspx?FamilyID=49737737-681e-465e-83c5-51b7223b1585&DisplayLang=en